Celery cultivar tbg 28

ABSTRACT

A celery cultivar designated TBG 28 is disclosed. The invention relates to the seeds of celery cultivar TBG 28, to the plants of celery cultivar TBG 28, and to methods for producing a celery plant by crossing the cultivar TBG 28 with itself or another celery cultivar. The invention further relates to methods for producing a celery plant containing in its genetic material one or more transgenes and to the transgenic celery plants and plant parts produced by those methods. This invention also relates to celery cultivars or breeding cultivars and plant parts derived from celery cultivar TBG 28, to methods for producing other celery cultivars, lines or plant parts derived from celery cultivar TBG 28, and to the celery plants, varieties, and their parts derived from the use of those methods. The invention further relates to hybrid celery seeds, plants, and plant parts produced by crossing cultivar TBG 28 with another celery cultivar.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinctive celery (Apium graveolens var. duke) variety designated TBG 28. All publications cited in this application are herein incorporated by reference.

There are numerous steps in the development of any novel, desirable plant germplasm. Plant breeding begins with the analysis, definition of problems and weaknesses of the current germplasm, the establishment of program goals, and the definition of specific breeding objectives. The next step is selection of germplasm that possesses the traits to meet the program goals. The goal is to combine in a single variety or hybrid an improved combination of desirable traits from the parental germplasm. These important traits may include improved flavor, increased stalk size and weight, higher seed yield, improved color, resistance to diseases and insects, tolerance to drought and heat, and better agronomic quality.

All cultivated forms of celery belong to the species Apium graveolens var. duke that is grown for its edible stalk. As a crop, celery is grown commercially wherever environmental conditions permit the production of an economically viable yield. In the United States, the principal growing regions are California, Florida, Arizona, and Michigan. Fresh celery is available in the United States year-round, although the greatest supply is from November through January. For planting purposes, the celery season is typically divided into two seasons: summer and winter, with Florida and the southern California areas harvesting from November to July, and Michigan and northern California harvesting from July to October. Celery is consumed as fresh, raw product and as a cooked vegetable.

Celery is a cool-season biennial that grows best from 60° F. to 65° F. (16° C. to 18° C.), but will tolerate temperatures from 45° F. to 75° F. (7° C. to 24° C.). Freezing damages mature celery by splitting the petioles or causing the skin to peel, making the stalks unmarketable. This can be a problem for crops planted in the winter regions; however, celery can tolerate minor freezes early in the production cycle.

The two main growing regions for celery in California are located along the Pacific Ocean: the central coast or summer production area (Monterey, San Benito, Santa Cruz and San Luis Obispo Counties) and the south coast or winter production area (Ventura and Santa Barbara Counties). A minor region (winter) is located in the southern deserts (Riverside and Imperial Counties).

In the south coast, celery is transplanted from early August to April for harvest from November to mid-July; in the Santa Maria area, celery is transplanted from January to August for harvest from April through December. In the central coast, fields are transplanted from March to September for harvest from late June to late December. In the southern deserts, fields are transplanted in late August for harvest in January.

Commonly used celery varieties for coastal production include Command, Mission, Conquistador and Sonora. Some shippers use their own proprietary varieties. Celery seed is very small and difficult to germinate. All commercial celery is planted as greenhouse-grown transplants. Celery grown from transplants is more uniform than from seed and takes less time to grow the crop in the field. Transplanted celery is traditionally placed in double rows on 40-inch (100-cm) beds with plants spaced between 6.0 and 7.0 inches apart.

Celery requires a relatively long and cool growing season (The physiology of vegetable crops by Pressman, CAB Intl., New York, 1997). Earlier transplanting results in a longer growing season, increased yields, and better prices. However, celery scheduled for spring harvest often involves production in the coolest weather conditions of winter, a period during which vernalization can occur. If adequate vernalization occurs for the variety, bolting may be initiated. Bolting is the premature rapid elongation of the main celery stem into a floral axis (i.e., during the first year for this normally biennial species). Bolting slows growth as the plant approaches marketable size and leaves a stalk with no commercial value. Different varieties have different vernalization requirements, but in the presence of bolting, the length of the seed stem can be used as a means of measuring bolting tolerance that exists in each different variety. The most susceptible varieties reach their vernalization requirement earlier and have time to develop the longest seed stems, while the moderately tolerant varieties take longer to reach their vernalization requirement and have less time to develop a seed stem which would therefore be shorter. Under normal production conditions, the most tolerant varieties may not achieve their vernalization requirement and therefore not produce a measurable seed stem.

The coldest months when celery is grown in the United States are December, January, and February. If celery is going to reach its vernalization requirements to cause bolting, it is generally younger celery that is exposed to this cold weather window. This celery generally matures in the months of April and May which constitute what the celery industry calls the bolting or seeder window. The bolting or seeder window is a period where seed stems are generally going to impact the quality of the marketable celery, and this is most consistently experienced in celery grown in the Southern California region. The presence of seed stems in celery can be considered a major marketable defect as set forth in the USDA grade standards. If the seed stem is longer than twice the diameter of the celery stalk or eight inches, the celery no longer meets the standards of US Grade #1. If the seed stem is longer than three times the diameter of the celery stalk, the celery is no longer marketable as US Grade #2 (United States Standards for Grades of Celery, United States Department of Agriculture, reprinted January 1997).

Celery is an allogamous biennial crop. The celery genome consists of 11 chromosomes. Its high degree of out-crossing is accomplished by insects and wind pollination. Pollinators of celery flowers include a large number of wasp, bee, and fly species. Celery is subject to inbreeding depression, which appears to be dependent upon the genetic background as some lines are able to withstand selfing for three or four generations.

Celery flowers are protandrous, with pollen being released 3-6 days before stigma receptivity. At the time of stigma receptivity, the stamens will have fallen, and the two stigmata will have unfolded in an upright position. The degree of protandry varies, which makes it difficult to perform reliable hybridization, due to the possibility of accidental selfing.

Celery flowers are very small, which significantly hinders easy removal of individual anthers. Furthermore, different developmental stages of the flowers in umbels make it difficult to avoid uncontrolled pollinations. The standard hybridization technique in celery consists of selecting flower buds of the same size and eliminating the older and younger flowers. Then, the umbellets are covered with glycine paper bags for a 5 to 10-day period, during which the stigmas become receptive. At the time the flowers are receptive, available pollen or umbellets shedding pollen from selected male parents are rubbed on to the stigmas of the female parent.

Celery plants require a period of vernalization while in the vegetative phase in order to induce seed stalk development. A period of 6-10 weeks at 5° C. to 8° C. when the plants are greater than 4 weeks old is usually adequate for most non-bolting tolerant varieties. Due to a wide range of responses to the cold treatment, it is often difficult to synchronize crossing, since plants will flower at different times. However, pollen can be stored for 6-8 months at −10° C. in the presence of silica gel or calcium chloride with a viability decline of only 20-40%, thus providing flexibility to perform crosses over a longer time.

For selfing, the plant or selected umbels are caged in cloth bags. These are shaken several times during the day to promote pollen release. Houseflies (Musca domestica) can also be introduced weekly into the bags to perform pollinations.

Celery in general is an important and valuable vegetable crop. Thus, a continuing goal of celery plant breeders is to develop stable, high yielding celery cultivars that are resistant to diseases and agronomically sound to maximize the amount of yield produced on the land. To accomplish this goal, the celery breeder must select and develop celery plants that have the traits that result in superior cultivars.

The foregoing examples of the related art and limitations related therewith are intended to be illustrative and not exclusive. Other limitations of the related art will become apparent to those of skill in the art upon a reading of the specification.

SUMMARY OF THE INVENTION

The following embodiments and aspects thereof are described in conjunction with systems, tools, and methods which are meant to be exemplary and illustrative, not limiting in scope. In various embodiments, one or more of the above-described problems have been reduced or eliminated, while other embodiments are directed to other improvements.

According to the invention, there is provided a novel celery cultivar designated TBG 28. Also provided are celery plants having the physiological and morphological characteristics of celery cultivar TBG 28. This invention thus relates to the seeds of celery cultivar TBG 28, to the plants of celery cultivar TBG 28, and to methods for producing a celery plant by crossing celery TBG 28 with itself or another celery plant, to methods for producing a celery plant containing in its genetic material one or more transgenes and to the transgenic celery plants produced by that method. This invention also relates to methods for producing other celery cultivars derived from celery cultivar TBG 28 and to the celery cultivar derived by the use of those methods. This invention further relates to hybrid celery seeds and plants produced by crossing celery cultivar TBG 28 with another celery line.

This invention further relates to the F₁ hybrid celery plants and plant parts grown from the hybrid seed produced by crossing celery cultivar TBG 28 to a second celery plant. Still further included in the invention are the seeds of an F₁ hybrid plant produced with the celery cultivar TBG 28 as one parent, the second generation (F₂) hybrid celery plant grown from the seed of the F₁ hybrid plant, and the seeds of the F₂ hybrid plant. Thus, any such methods using the celery cultivar TBG 28 are part of this invention: selfing, backcrosses, hybrid production, crosses to populations, and the like. All plants produced using celery cultivar TBG 28 as at least one parent are within the scope of this invention. Advantageously, the celery cultivar could be used in crosses with other, different, celery plants to produce first generation (F₁) celery hybrid seeds and plants with superior characteristics.

The invention further provides methods for developing celery plants derived from celery cultivar TBG 28 in a celery plant breeding program using plant breeding techniques including recurrent selection, backcrossing, pedigree breeding, restriction fragment length polymorphism enhanced selection, genetic marker enhanced selection and transformation. Seeds, celery plants, and parts thereof, produced by such breeding methods are also part of the invention.

In another aspect, the present invention provides protoplasts and regenerable cells for use in tissue culture of celery cultivar TBG 28. The tissue culture will preferably be capable of regenerating plants having essentially all of the physiological and morphological characteristics of the foregoing celery plant, and of regenerating plants having substantially the same genotype as the foregoing celery plant. Preferably, the regenerable cells in such tissue cultures will be callus, protoplasts, meristematic cells, leaves, pollen, embryos, roots, root tips, anthers, pistils, flowers, seeds, petioles, and suckers. Still further, the present invention provides celery plants regenerated from the tissue cultures of the invention.

In another aspect, the present invention provides for single or multiple gene converted plants of TBG 28. The single or multiple transferred gene(s) may preferably be a dominant or recessive allele. Preferably, the single or multiple transferred gene(s) will confer such traits as male sterility, herbicide resistance, insect resistance, modified fatty acid metabolism, modified carbohydrate metabolism, resistance for bacterial, fungal, or viral disease, male fertility, enhanced nutritional quality and industrial usage or the transferred gene will have no apparent value except for the purpose of being a marker for variety identification. The single or multiple gene(s) may be a naturally occurring celery gene or a transgene introduced through genetic engineering techniques.

The invention also relates to methods for producing a celery plant containing in its genetic material one or more transgenes and to the transgenic celery plant produced by those methods.

In another aspect, the present invention provides for methods of introducing one or more desired trait(s) into celery cultivar TBG 28 and plants or seeds obtained from such methods. The desired trait(s) may be, but not exclusively, a single gene, preferably a dominant but also a recessive allele. Preferably, the transferred gene or genes will confer such traits as male sterility, herbicide resistance, insect resistance, disease resistance, resistance for bacterial, fungal, or viral disease, male fertility, water stress tolerance, enhanced nutritional quality, modified fatty acid metabolism, modified carbohydrate metabolism, enhanced plant quality, and industrial usage. The gene or genes may be naturally occurring rice gene(s). The method for introducing the desired trait(s) may be a backcrossing process making use of a series of backcrosses to the celery cultivar TBG 28 during which the desired trait(s) is maintained by selection. The desired trait may also be introduced via transformation.

The invention further relates to methods for genetically modifying a celery plant of the celery cultivar TBG 28 and to the modified celery plant produced by those methods. The genetic modification methods may include, but are not limited to mutation, genome editing, gene silencing, RNA interference, backcross conversion, genetic transformation, single and multiple gene conversion, and/or direct gene transfer. The invention further relates to a genetically modified celery plant produced by the above methods, wherein the genetically modified celery plant comprises the genetic modification and otherwise comprises all of the physiological and morphological characteristics of celery cultivar TBG 28.

In addition to the exemplary aspects and embodiments described above, further aspects and embodiments will become apparent by reference by the study of the following descriptions.

DETAILED DESCRIPTION OF THE INVENTION

In the description and tables which follow, a number of terms are used. In order to provide a clear and consistent understanding of the specification and claims, including the scope to be given such terms, the following definitions are provided:

Allele. An allele is any of one or more alternative form of a gene, all of which relate to one trait or characteristic. In a diploid cell or organism, the two alleles of a given gene occupy corresponding loci on a pair of homologous chromosomes.

Backcrossing. Backcrossing is a process in which a breeder repeatedly crosses hybrid progeny back to one of the parents, for example, a first-generation hybrid F₁ with one of the parental genotype of the F₁ hybrid.

Bacterial blight. A bacterial disease of celery caused by Pseudomonas syringae pv. apii. The initial symptoms appear on the leaves as small, bright yellow, circular spots. As these enlarge with a yellow halo, they turn to a rust color. As the spots increase in number, they merge to eventually kill the leaf tissue. Bacterial blight is favored by cool, wet conditions and at least 10 hours of leaf wetness is required for infection. The disease is spread by water splashes, farm machinery and field workers especially when the foliage is wet.

Black streak. A physiological disorder in celery plants causing some petioles, when cut, to show “black streaks” in the lower half or throughout the entire length of the petiole, making the entire crop unmarketable. Symptoms can be triggered under field conditions by high temperatures.

Blackheart. Blackheart is due to a lack of movement of sufficient calcium that causes the plant to turn brown and begin to decay at the growing point of the plant. Celery in certain conditions, such as warm weather, grows very rapidly and is incapable of moving sufficient amounts of calcium to the growing point.

Bolting. The premature development of a flowering or seed stalk, and subsequent seed, before a plant produces a food crop. Bolting is typically caused by late planting when temperatures are low enough to cause vernalization of the plants.

Bolting period. Also known as the bolting or seeder window, and generally occurs in celery that is transplanted from the middle of December through January and matures in April to May. The intensity and actual weeks that bolting may be observed vary from year to year, but it is generally observed in this window.

Bolting tolerance. The amount of vernalization that is required for different celery varieties to bolt is genetically controlled. Varieties with increased tolerance to bolting require greater periods of vernalization in order to initiate bolting. A comparison of bolting tolerance between varieties can be measured by the length of the flowering or seed stem under similar vernalization conditions.

Brown stem. A disease caused by the bacterium Pseudomonas cichorii that causes petiole necrosis. Brown Stem is characterized by a firm, brown discoloration throughout the petiole.

Celeriac or Root celery (Apium graveolens L. var. rapaceum). A plant that is related to celery but instead of having a thickened and succulent leaf petiole as in celery, celeriac has an enlarged hypocotyl and upper root that is the edible product.

Celery heart. The center most interior petioles and leaves of the celery stalk. They are not only the smallest petioles in the stalk, but the youngest as well. Some varieties are considered heartless because they go right from very large petioles to only a couple of very small petioles. The heart is comprised of the petioles that are closest to the meristem of the celery stalk.

Colletotrichum. One of the most common and important genera of plant-pathogenic fungi. Causes post-harvest rots, and anthracnose spots and blights of aerial plant parts. In celery it is also frequently accompanied by curling of the foliage and black heart. Colletotrichum acutatum sensu lato has been reclassified to be Colletotrichum fioriniae (Pavel, J. A., The Etiology, Virulence, and Phylogenetics of the Celery Anthracnose Pathogen, Colletotrichum fioriniae (=C. acutatum sensu lato), Graduate Theses and Dissertations (2016)).

Consumable. Means material that is edible by humans.

Crackstem. The petiole can crack or split horizontally or longitudinally. Numerous cracks in several locations along the petiole are often an indication that the variety has insufficient boron nutrition. A variety's ability to utilize boron is a physiological characteristic which is genetically controlled.

Essentially all of the physiological and morphological characteristics. A plant having essentially all of the physiological and morphological characteristics of a designated plant has all of the characteristics of the plant that are otherwise present when compared in the same environment, other than an occasional variant trait that might arise during backcrossing or direct introduction of a transgene.

F_(#). The “F” symbol denotes the filial generation, and the # is the generation number, such as F₁, F₂, F₃, etc.

F₁ hybrid. The first-generation progeny of the cross of two nonisogenic plants.

Feather leaf. Feather Leaf is a yellowing of the lower leaflets and generally occurs in the outer petioles but can also be found on inner petioles of the stalk. These yellowing leaves which would normally remain in the harvested stalk are considered unacceptable. These petioles then have to be stripped off in order to meet USDA standards which effectively decreases the stalk size and yield.

Flare. The lower, generally wider portion of the petiole which is usually a paler green or white. Some also refer to this as the spoon, scoop, or shovel.

Fusarium yellows. A fungal soilborne disease caused by Fusarium oxysporum f. sp. apii Race 2 and/or Race 4. Infected plants turn yellow and are stunted. Some of the large roots may have a dark brown and a water-soaked appearance. The water-conducting tissue (xylem) in the stem, crown, and root show a characteristic orange-brown discoloration. In the later stages of infection, plants remain severely stunted and yellowed and may collapse. The disease appears most severe during warm seasons, and in heavy, wet soils. Race 4 may also produce symptoms of black heart.

Gene. As used herein, “gene” refers to a segment of nucleic acid. A gene can be introduced into a genome of a species, whether from a different species or from the same species, using transformation or various breeding techniques.

Gene silencing. The interruption or suppression of the expression of a gene at the level of transcription or translation.

Genetically modified. Describes an organism that has received genetic material from another organism, or had its genetic material modified, resulting in a change in one or more of its phenotypic characteristics. Methods used to modify, introduce or delete the genetic material may include mutation breeding, genome editing, RNA interference, backcross conversion, genetic transformation, single and multiple gene conversion, and/or direct gene transfer.

Genome editing. A type of genetic engineering in which DNA is inserted, replaced, modified or removed from a genome using artificially engineered nucleases or other targeted changes using homologous recombination. Examples include but are not limited to use of zinc finger nucleases (ZFNs), TAL effector nucleases (TALENs), endonucleases, meganucleases, CRISPR/Cas9, and other CRISPR related technologies. (Ma et. al., Molecular Plant, 9:961-974 (2016); Belhaj et. al., Current Opinion in Biotechnology, 32:76-84 (2015)).

Gross yield (Pounds/Acre). The total yield in pounds/acre of trimmed celery plants (stalks).

Leaf celery (Apium graveolens L. var. secalinum). A plant that has been developed primarily for leaf and seed production. Often grown in Mediterranean climates, leaf celery more closely resembles celery's wild ancestors. The stems are small and fragile and vary from solid to hollow and the leaves are fairly small and are generally bitter. This type is often used for its medicinal properties and spice.

Leaf margin chlorosis. A magnesium deficiency producing an interveinal chlorosis which starts at the margin of leaves.

Maturity date. Maturity in celery can be dictated by two conditions. The first, or true maturity, is the point in time when the celery reaches maximum size distribution, but before defects such as pith, yellowing, Feather Leaf or Brown Stem appear. The second, or market maturity is an artificial maturity dictated by market conditions, i.e, the market requirement may be for 3 dozen sizes, so the field is harvested at slightly below maximum yield potential because the smaller sizes are what the customers prefer at that moment.

Muck. Muck is a soil made up primarily of humus drained from swampland. It is used for growing specialty crops, such as onions, carrots, celery, and potatoes.

MUN. MUN refers to the MUNSELL Color Chart which publishes an official color chart for plant tissues according to a defined numbering system. The chart may be purchased from the Macbeth Division of Kollmorgen Instruments Corporation, 617 Little Britain Road, New Windsor, New York 12553-6148.

Petiole. A petiole is the stem or limb of a leaf, the primary portion of the celery consumed.

Petiole depth. The average measurement in millimeters of the depth of the celery petiole at its narrowest point. The petiole depth measurement is taken from the outside of the petiole (which is the part of the petiole that faces the outside of the stalk) and is measured to the inside of the petiole or cup or the inner most point of the petiole that faces the center of the stalk or heart.

Petiole width. The average measurement of the width of the celery petiole in millimeters at its widest point. The measurement is taken from the side or edge of petiole to the opposite side or edge of the petiole. The measurement is taken 90 degrees from petiole depth.

Phthalides. One of the chemical compounds that are responsible for the characteristic flavor and aroma of celery.

Pith. Pith is a sponginess/hollowness/white discoloration that occurs in the petioles of celery varieties naturally as they become over-mature. In some varieties it occurs at an earlier stage causing harvest to occur prior to ideal maturity. Pith generally occurs in the outer, older petioles first. If it occurs, these petioles are stripped off to make grade, which effectively decreases the stalk size and overall yield potential.

Plant height. The height of the plant from the bottom of the base or butt of the celery plant to the top of the tallest leaf.

Polyphenol oxidase (PPO). An enzyme that catalyzes the conversion of phenolic compounds to quinones and assists their products' polymerization. The catalysis of PPO, in the presence of oxygen, leads to the formation of undesirable brown pigments and off-flavored products.

Quantitative Trait Loci. Quantitative Trait Loci (QTL) refers to genetic loci that control to some degree, numerically representable traits that are usually continuously distributed.

Regeneration. Regeneration refers to the development of a plant from tissue culture.

Ribbing. The texture of the exterior surface of the celery petiole can vary from smooth to ribby depending on the variety. Ribbing is the presence of numerous ridges that run vertically along the petioles of the celery plant.

Seed stem. A seed stem is the result of the elongation of the main stem of the celery, which is usually very compressed to almost non-existent, to form the flowering axis. The seed stem or flowering axis can reach several feet in height during full flower. The length of the seed stem is measured as the distance from the top of the basal plate (the base of the seed stem) to its terminus (the terminal growing point).

Septoria apiicola. A fungus that is the cause of late blight in celery. Symptoms include chlorotic spots that turn brown and necrotic.

Single gene converted. Single gene converted or conversion plant refers to plants which are developed by backcrossing, or via genetic engineering, wherein essentially all of the desired morphological and physiological characteristics of a line are recovered in addition to the single gene transferred into the line via the backcrossing technique or via genetic engineering.

Stalk. A stalk is a single celery plant that is trimmed with the top or foliage and the roots removed.

Standard stem celery. A more traditional stem celery with moderate joint length, to be utilized and marketed as a whole stalk with 12 to 14 inch cut or for hearts in retail environment.

Stringiness. Stringiness is a physiological characteristic that is generally associated with strings that get stuck between the consumer's teeth. There are generally two sources of strings in celery. One is the vascular bundle which can be fairly elastic and behave as a string. The second is a strip of particularly strong epidermis cells called schlerenchyma which are located on the surface of the ridges of the celery varieties that have ribs.

Suckers. Suckers are auxiliary shoots that form at the base of the stalk or within the auxiliary buds between each petiole. If these shoots form between the petioles of the stalk, several petioles have to be stripped off causing the celery to become smaller and the functional yields to be decreased.

Tall stem celery. A stem celery with especially long petioles with primary purpose of being utilized for production of sticks or limbs.

Transgene. A nucleic acid of interest that can be introduced into the genome of a plant by genetic engineering techniques (e.g., transformation) or breeding.

Celery cultivar TBG 28 is a new traditional carton-style celery variety that was developed specifically for Michigan production conditions. Celery cultivar TBG 28 is the result of single plant selection in the Michigan growing area for improved tolerance to Colletotrichum fioriniae and several generations of single plant selection in California including for improved tolerance to Fusarium oxysporum f. sp. apii race 2. Celery cultivar TBG 28 has numerous characteristics that condition it for excellent performance under Michigan production conditions, competing very favorably with current commercial standards ADS-1 and ADS-22 (Tables 2 and 3). TBG 28 not only yields well (trimmed plant weight) but is taller and has longer petioles.

While performing well in Michigan muck soil in the summers, this does not translate well for Florida production on muck soils in the winter to spring. Tables 4 through 6 indicate that under Florida production conditions TBG 28 does not consistently compete well with Florida developed varieties, tending to yield lower based on trimmed plant yield (Tables 4-5), much like varieties developed for California, and is relatively inconsistent for defects (Tables 4-6).

While Fusarium oxysporum f. sp. apii race 2 is currently not an issue in Florida and tolerance is not a requirement for Florida varieties, it is a requirement for successful and consistent production results in Michigan. Most of the muck production farms in Michigan are infested with fusarium race 2. However, thus far these fusarium levels have not reached the virulence levels seen in many of the Oxnard, California production areas where it is more common to produce two celery crops in a single year due to the longer growing season and mild winters. Hence, a variety like TBG 28, which also had ancestral selection in Oxnard fusarium conditions, that has good to moderate fusarium race 2 tolerances (Tables 7-9) satisfies a significant prerequisite for success in Michigan. However, TBG 28 does not have tolerance to Fusarium oxysporum f. sp. apii race 4. When conditions have both race 2 and light levels of race 4 present TBG 28 falters (Tables 10-11). When production conditions have strong race 4 conditions, TBG 28 has no marketing potential and typically dies (Tables 12-16). Fortunately, Fusarium oxysporum f. sp. apii race 4 has not been identified in Michigan.

Celery cultivar TBG 28 does not hold up well and becomes unmarketable under moderate to heavy bolting conditions (Tables 17-18), which are also conditions not typically observed in Michigan.

Under low bolting pressure conditions and with no other apparent stresses (Table 19) or in conjunction with low infection levels of Fusarium oxysporum f. sp. apii race 2 (Tables 20-21) TBG 28 performed well in Oxnard. TBG 28 produced the longest petioles and tallest plants and was within the upper tier of varieties present in the respective trials for yield (trimmed plant weight). Both low bolting pressure and lower fusarium levels can be prominent issues in Michigan for the earlier planted crops in the season, so these tolerance levels can be particularly beneficial.

Other production limiting issues that can be problematic in Michigan are numerous diseases including Septoria apiicola, Colletotrichum fioriniae and Cercospora apii. These diseases can be more problematic in Michigan due to lack of breakdown of celery plant material in frozen overwintered production fields and the general nature of smaller muck fields surrounded by native wild vegetation that has alternative hosts which harbor the diseases. TBG 28 was selected under high pressure conditions for Colletotrichum fioriniae and has relatively high tolerance to the disease (Table 23) and surprisingly also has moderate tolerance to Septoria apiicola (Table 22) and Cercospora apii (Table 24).

Celery cultivar TBG 28 has the following morphologic and other characteristics (based primarily on data collected in Michigan):

TABLE 1 VARIETY DESCRIPTION INFORMATION Maturity: 87 days in Byron Center, Michigan Plant height: 86.2 cm Number of outer petioles (>35.6 cm): 11.6 Number of inner petioles (<35.6 cm): 8.2 Stalk shape: Cylindrical Stalk conformation: Compact Heart formation: Moderate Petiole length (from butt to first joint): 35.3 cm Petiole width (at petiole midpoint): 18.6 mm Petiole thickness (at petiole midpoint): 10.1 mm Petiole cross section shape: Cup Petiole color (un-blanched at harvest): MUN 5gy 7/8 Anthocyanin: Absent Stringiness: Very slight Ribbing: Smooth Glossiness: Glossy Leaf blade color: MUN 5gy 4/6 to MUN 5gy 4/8 Bolting tolerance: Slight Stress tolerance: Adaxial crackstem (boron deficiency): Tolerant Abaxial crackstem (boron deficiency): Tolerant Leaf margin chlorosis (magnesium deficiency): Tolerant Blackheart (calcium deficiency): Tolerant Pithiness (nutritional deficiency): Moderately tolerant Feather leaf: Tolerant Sucker development: Tolerant Disease resistance: Brown stem (Pseudomonas cichorii): Tolerant Late blight (Septoria apii): Moderately tolerant Early blight (Cercospora apii): Moderately tolerant Colletotrichum fioriniae: Good tolerance Fusarium oxysporum f. sp. apii race 2: Moderately tolerant Fusarium oxysporum f. sp. apii race 4: Susceptible

This invention is also directed to methods for producing a celery plant by crossing a first parent celery plant with a second parent celery plant, wherein the first parent celery plant or second parent celery plant is celery cultivar TBG 28. Further, both the first parent celery plant and second parent celery plant may be from celery cultivar TBG 28. Still further, this invention also is directed to methods for producing a cultivar TBG 28-derived celery plant by crossing cultivar TBG 28 with a second celery plant and growing the progeny seed and repeating the crossing and growing steps with the cultivar TBG 28-derived plant from 0 to 7 times. Thus, any such methods using the cultivar TBG 28 are part of this invention: selfing, backcrosses, hybrid production, crosses to populations, and the like. All plants produced using cultivar TBG 28 as a parent are within the scope of this invention, including plants derived from cultivar TBG 28. Advantageously, cultivar TBG 28 can be used in crosses with other, different cultivars to produce first generation (F₁) celery seeds and plants with superior characteristics.

Additional methods include, but are not limited to, expression vectors introduced into plant tissues using a direct gene transfer method such as microprojectile-mediated delivery, DNA injection, electroporation and the like. More preferably, expression vectors are introduced into plant tissues by using either microprojectile-mediated delivery with a biolistic device or by using Agrobacterium-mediated transformation. Transformant plants obtained with the protoplasm of the invention are intended to be within the scope of this invention.

As used herein, the term “plant” includes plant cells, plant protoplasts, plant cell tissue cultures from which celery plants can be regenerated, plant calli, plant clumps and plant cells that are intact in plants or parts of plants, such as leaves, pollen, embryos, meristematic cells, hypocotyls, roots, root tips, anthers, pistils, flowers, seeds, stems, and the like.

Further Embodiments of the Invention

Celery in general is an important and valuable vegetable crop. Thus, a continuing goal of celery plant breeders is to develop stable, high yielding celery cultivars that are agronomically sound. To accomplish this goal, the celery breeder must select and develop celery plants with traits that result in superior cultivars.

Plant breeding techniques known in the art and used in a celery plant breeding program include, but are not limited to, pedigree breeding, recurrent selection, mass selection, single or multiple-seed descent, bulk selection, backcrossing, open pollination breeding, restriction fragment length polymorphism enhanced selection, genetic marker enhanced selection, making double haploids, and transformation. Often combinations of these techniques are used. The development of celery varieties in a plant breeding program requires, in general, the development and evaluation of homozygous varieties. There are many analytical methods available to evaluate a new variety. The oldest and most traditional method of analysis is the observation of phenotypic traits, but genotypic analysis may also be used.

Using Celery Cultivar TBG 28 to Develop Other Celery Varieties

This invention also is directed to methods for producing a celery plant by crossing a first parent celery plant with a second parent celery plant wherein the first or second parent celery plant is a celery plant of cultivar TBG 28. Further, both first and second parent celery plants can come from celery cultivar TBG 28. Also provided are methods for producing a celery plant having substantially all of the morphological and physiological characteristics of cultivar TBG 28, by crossing a first parent celery plant with a second parent celery plant wherein the first and/or the second parent celery plant is a plant having substantially all of the morphological and physiological characteristics of cultivar TBG 28 as determined at the 5% significance level when grown in the same environmental conditions. The other parent may be any celery plant, such as a celery plant that is part of a synthetic or natural population. Thus, any such methods using celery cultivar TBG 28 are part of this invention: selfing, backcrosses, hybrid production, crosses to populations, and the like. All plants produced using celery cultivar TBG 28 as at least one parent are within the scope of this invention, including those developed from cultivars derived from celery cultivar TBG 28.

The cultivar of the invention can also be used for transformation where exogenous genes are introduced and expressed by the cultivar of the invention. Genetic variants created either through traditional breeding methods using celery cultivar TBG 28 or through transformation of cultivar TBG 28 by any of a number of protocols known to those of skill in the art are intended to be within the scope of this invention.

The following describes breeding methods that may be used with celery cultivar TBG 28 in the development of further celery plants. One such embodiment is a method for developing a progeny celery plant in a celery plant breeding program comprising: obtaining the celery plant, or a part thereof, of cultivar TBG 28, utilizing said plant or plant part as a source of breeding material, and selecting a celery cultivar TBG 28 progeny plant with molecular markers in common with cultivar TBG 28 and/or with morphological and/or physiological characteristics of celery cultivar TBG 28. Breeding steps that may be used in the celery plant breeding program include, but are not limited to, pedigree breeding, backcrossing, mutation breeding, and recurrent selection. In conjunction with these steps, techniques such as RFLP-enhanced selection, genetic marker enhanced selection (for example SSR markers) and the making of double haploids may be utilized.

Another method involves producing a population of celery cultivar TBG 28 progeny celery plants, comprising crossing cultivar TBG 28 with another celery plant, thereby producing a population of celery plants, which, on average, derive 50% of their alleles from celery cultivar TBG 28. A plant of this population may be selected and repeatedly selfed or sibbed with a celery cultivar resulting from these successive filial generations. One embodiment of this invention is the celery cultivar produced by this method and that has obtained at least 50% of its alleles from celery cultivar TBG 28.

Still yet another aspect of the invention is a method of producing a celery plant derived from the celery cultivar TBG 28, the method comprising the steps of: (a) preparing a progeny plant derived from celery cultivar TBG 28 by crossing a plant of the celery cultivar TBG 28 with a second celery plant; and (b) crossing the progeny plant with itself or a second plant to produce a seed of a progeny plant of a subsequent generation which is derived from a plant of the celery cultivar TBG 28. In further embodiments of the invention, the method may additionally comprise: (c) growing a progeny plant of a subsequent generation from said seed of a progeny plant of a subsequent generation and crossing the progeny plant of a subsequent generation with itself or a second plant; and repeating the steps for an additional 2-10 generations to produce a celery plant derived from the celery cultivar TBG 28. The plant derived from celery cultivar TBG 28 may be an inbred line, and the aforementioned repeated crossing steps may be defined as comprising sufficient inbreeding to produce the inbred line. In the method, it may be desirable to select particular plants resulting from step (c) for continued crossing according to steps (b) and (c). By selecting plants having one or more desirable traits, a plant derived from celery cultivar TBG 28 is obtained which possesses some of the desirable traits of the line as well as potentially other selected traits. Also provided by the invention is a plant produced by this and the other methods of the invention.

In another embodiment of the invention, the method of producing a celery plant derived from the celery cultivar TBG 28 further comprises: (a) crossing the celery cultivar TBG 28-derived celery plant with itself or another celery plant to yield additional celery cultivar TBG 28-derived progeny celery seed; (b) growing the progeny celery seed of step (a) under plant growth conditions to yield additional celery cultivar TBG 28-derived celery plants; and (c) repeating the crossing and growing steps of (a) and (b) to generate further celery cultivar TBG 28-derived celery plants. In specific embodiments, steps (a) and (b) may be repeated at least 1, 2, 3, 4, or 5 or more times as desired. The invention still further provides a celery plant produced by this and the foregoing methods.

Progeny of celery cultivar TBG 28 may also be characterized through their filial relationship with celery cultivar TBG 28, as for example, being within a certain number of breeding crosses of celery cultivar TBG 28. A breeding cross is a cross made to introduce new genetics into the progeny, and is distinguished from a cross, such as a self or a sib cross, made to select among existing genetic alleles. The lower the number of breeding crosses in the pedigree, the closer the relationship between celery cultivar TBG 28 and its progeny. For example, progeny produced by the methods described herein may be within 1, 2, 3, 4 or 5 breeding crosses of celery cultivar TBG 28.

One of ordinary skill in the art of plant breeding would know how to evaluate the traits of two plant varieties to determine if there is no significant difference between the two traits expressed by those varieties. For example, see, Fehr and Walt, Principles of Cultivar Development, pp. 261-286 (1987). Thus the invention includes celery cultivar TBG 28 progeny celery plants comprising a combination of at least two cultivar TBG 28 traits selected from the group consisting of those listed in Table 1 or the cultivar TBG 28 combination of traits listed in the Detailed Description of the Invention, so that said progeny celery plant is not significantly different for said traits than celery cultivar TBG 28 as determined at the 5% significance level when grown in the same environmental conditions. Using techniques described herein, molecular markers may be used to identify said progeny plant as a celery cultivar TBG 28 progeny plant. Mean trait values may be used to determine whether trait differences are significant, and preferably the traits are measured on plants grown under the same environmental conditions. Once such a variety is developed its value is substantial since it is important to advance the germplasm base as a whole in order to maintain or improve traits such as yield, disease resistance, pest resistance, and plant performance in extreme environmental conditions.

The goal of celery plant breeding is to develop new, unique, and superior celery cultivars. The breeder initially selects and crosses two or more parental lines, followed by repeated selfing and selection, producing many new genetic combinations. The breeder can theoretically generate billions of different genetic combinations via crossing, selfing, and mutations. The breeder has no direct control at the cellular level and the cultivars that are developed are unpredictable. This unpredictability is because the breeder's selection occurs in unique environments, with no control at the DNA level (using conventional breeding procedures), and with millions of different possible genetic combinations being generated. A breeder of ordinary skill in the art cannot predict the final resulting lines he develops, except possibly in a very gross and general fashion. The same breeder cannot produce the same line twice by using the exact same original parents and the same selection techniques. Therefore, two breeders will never develop the same line, or even very similar lines, having the same celery traits.

Pedigree breeding is used commonly for the improvement of self-pollinating crops or inbred lines of cross-pollinating crops. Pedigree breeding starts with the crossing of two genotypes, such as celery cultivar TBG 28 or a celery variety having all of the morphological and physiological characteristics of TBG 28, and another celery variety having one or more desirable characteristics that is lacking or which complements celery cultivar TBG 28. If the two original parents do not provide all the desired characteristics, other sources can be included in the breeding population. In the pedigree method, superior plants are selfed and selected in successive filial generations. In the succeeding filial generations, the heterozygous condition gives way to the homozygous allele condition as a result of inbreeding. Typically, in the pedigree method of breeding, five or more successive filial generations of selfing and selection is practiced: F₁ to F₂; F₂ to F₃; F₃ to F₄; F₄ to F₅; etc. In some examples, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more generations of selfing and selection are practiced. After a sufficient amount of inbreeding, successive filial generations will serve to increase seed of the developed variety. Preferably, the developed variety comprises homozygous alleles at about 95% or more of its loci.

In addition to being used to create backcross conversion populations, backcrossing can also be used in combination with pedigree breeding. As discussed previously, backcrossing can be used to transfer one or more specifically desirable traits from one variety (the donor parent) to a developed variety (the recurrent parent), which has good overall agronomic characteristics yet may lack one or more other desirable traits. However, the same procedure can be used to move the progeny toward the genotype of the recurrent parent but at the same time retain many components of the non-recurrent parent by stopping the backcrossing at an early stage and proceeding with selfing and selection. For example, a celery variety may be crossed with another variety to produce a first-generation progeny plant. The first-generation progeny plant may then be backcrossed to one of its parent varieties to create a F₁BC₁. Progeny are selfed and selected so that the newly developed variety has many of the attributes of the recurrent parent and yet several of the desired attributes of the donor parent. This approach leverages the value and strengths of both parents for use in new celery varieties.

Therefore, in some examples a method of making a backcross conversion of celery cultivar TBG 28, comprising the steps of crossing a plant of celery cultivar TBG 28 or a celery variety having all of the morphological and physiological characteristics of TBG 28 with a donor plant possessing a desired trait to introduce the desired trait, selecting an F₁ progeny plant containing the desired trait, and backcrossing the selected F₁ progeny plant to a plant of celery cultivar TBG 28 are provided. This method may further comprise the step of obtaining a molecular marker profile of celery cultivar TBG 28 and using the molecular marker profile to select for a progeny plant with the desired trait and the molecular marker profile of TBG 28. The molecular marker profile can comprise information from one or more markers. In one example the desired trait is a mutant gene or transgene present in the donor parent. In another example, the desired trait is a native trait in the donor parent.

Mass and recurrent selections can be used to improve populations of either self- or cross-pollinating crops. A genetically variable population of heterozygous individuals is either identified or created by intercrossing several different parents. The best plants are selected based on individual superiority, outstanding progeny, or excellent combining ability. The selected plants are intercrossed to produce a new population in which further cycles of selection are continued.

The single-seed descent procedure in the strict sense refers to planting a segregating population, harvesting a sample of one seed per plant, and using the one-seed sample to plant the next generation. When the population has been advanced from the F₂ to the desired level of inbreeding, the plants from which lines are derived will each trace to different F₂ individuals. The number of plants in a population declines each generation due to failure of some seeds to germinate or some plants to produce at least one seed. As a result, not all of the F₂ plants originally sampled in the population, will be represented by a progeny when generation advance is completed.

Mutation breeding is another method of introducing new traits into celery varieties. Mutations that occur spontaneously or are artificially induced can be useful sources of variability for a plant breeder. The goal of artificial mutagenesis is to increase the rate of mutation for a desired characteristic. Mutation rates can be increased by many different means including temperature, long-term seed storage, tissue culture conditions, radiation (such as X-rays, Gamma rays, neutrons, Beta radiation, or ultraviolet radiation), chemical mutagens (such as base analogs like 5-bromo-uracil), antibiotics, alkylating agents (such as sulfur mustards, nitrogen mustards, epoxides, ethyleneamines, sulfates, sulfonates, sulfones, or lactones), azide, hydroxylamine, nitrous acid or acridines. Once a desired trait is observed through mutagenesis the trait may then be incorporated into existing germplasm by traditional breeding techniques. Details of mutation breeding can be found in “Principles of Cultivar Development” by Fehr, Macmillan Publishing Company, 1993. In addition, mutations created in other celery plants may be used to produce a backcross conversion of celery cultivar TBG 28 that comprises such mutation.

Selection of celery plants for breeding is not necessarily dependent on the phenotype of a plant and instead can be based on genetic investigations. For example, one may utilize a suitable genetic marker which is closely associated with a trait of interest. One of these markers may therefore be used to identify the presence or absence of a trait in the offspring of a particular cross, and hence may be used in selection of progeny for continued breeding. This technique may commonly be referred to as marker assisted selection. Any other type of genetic marker or other assay which is able to identify the relative presence or absence of a trait of interest in a plant may also be useful for breeding purposes. Procedures for marker assisted selection applicable to the breeding of celeries are well known in the art. Such methods will be of particular utility in the case of recessive traits and variable phenotypes, or where conventional assays may be more expensive, time consuming or otherwise disadvantageous. Types of genetic markers which could be used in accordance with the invention include, but are not necessarily limited to, Isozyme Electrophoresis, Restriction Fragment Length Polymorphisms (RFLPs), Simple Sequence Length Polymorphisms (SSLPs) (Williams et al., Nucleic Acids Res., 18:6531-6535, 1990), Randomly Amplified Polymorphic DNAs (RAPDs), DNA Amplification Fingerprinting (DAF), Sequence Characterized Amplified Regions (SCARs), Arbitrary Primed Polymerase Chain Reaction (AP-PCR), Amplified Fragment Length Polymorphisms (AFLPs) (EP 534 858, specifically incorporated herein by reference in its entirety), Simple Sequence Repeats (SSRs), and Single Nucleotide Polymorphisms (SNPs) (Wang et al., Science, 280:1077-1082, 1998).

The production of double haploids can also be used for the development of homozygous varieties in a breeding program. Double haploids are produced by the doubling of a set of chromosomes from a heterozygous plant to produce a completely homozygous individual. For example, see, Wan, et al., “Efficient Production of Doubled Haploid Plants Through Colchicine Treatment of Anther-Derived Maize Callus,” Theoretical and Applied Genetics, 77:889-892 (1989) and U.S. Pat. No. 7,135,615. This can be advantageous because the process omits the generations of selfing needed to obtain a homozygous plant from a heterozygous source.

Descriptions of other breeding methods that are commonly used for different traits and crops can be found in one of several reference books (e.g., Allard, “Principles of plant breeding,” John Wiley & Sons, NY, University of California, Davis, Calif, 50-98, 1960; Simmonds, “Principles of crop improvement,” Longman, Inc., NY, 369-399, 1979; Sneep and Hendriksen, “Plant breeding perspectives,” Wageningen (ed), Center for Agricultural Publishing and Documentation, 1979; Fehr, In: Soybeans: Improvement, Production and Uses,” 2d Ed., Manograph 16:249, 1987; Fehr, “Principles of cultivar development,” Theory and Technique (Vol 1) and Crop Species Soybean (Vol 2), Iowa State Univ., Macmillian Pub. Co., NY, 360-376, 1987; Poehlman and Sleper, “Breeding Field Crops” Iowa State University Press, Ames, 1995; Sprague and Dudley, eds., Corn and Improvement, 5th ed., 2006).

Genotypic Profile of TBG 28 and Progeny

In addition to phenotypic observations, a plant can also be identified by its genotype. The genotype of a plant can be characterized through a genetic marker profile which can identify plants of the same variety or a related variety, or which can be used to determine or validate a pedigree. Genetic marker profiles can be obtained by techniques such as restriction fragment length polymorphisms (RFLPs), randomly amplified polymorphic DNAs (RAPDs), arbitrarily primed polymerase chain reaction (AP-PCR), DNA amplification fingerprinting (DAF), sequence characterized amplified regions (SCARs), amplified fragment length polymorphisms (AFLPs), simple sequence repeats (SSRs) also referred to as microsatellites, single nucleotide polymorphisms (SNPs), or genome-wide evaluations such as genotyping-by-sequencing (GBS). For example, see Cregan et al. (1999) “An Integrated Genetic Linkage Map of the Soybean Genome” Crop Science 39:1464-1490, and Berry et al. (2003) “Assessing Probability of Ancestry Using Simple Sequence Repeat Profiles: Applications to Maize Inbred Lines and Soybean Varieties” Genetics 165:331-342, each of which are incorporated by reference herein in their entirety. Favorable genotypes and or marker profiles, optionally associated with a trait of interest, may be identified by one or more methodologies.

In some examples one or more markers are used, including but not limited to AFLPs, RFLPs, ASH, SSRs, SNPs, indels, padlock probes, molecular inversion probes, microarrays, sequencing, and the like. In some methods, a target nucleic acid is amplified prior to hybridization with a probe. In other cases, the target nucleic acid is not amplified prior to hybridization, such as methods using molecular inversion probes (see, for example Hardenbol et al. (2003) Nat Biotech 21:673-678). In some examples, the genotype related to a specific trait is monitored, while in other examples, a genome-wide evaluation including but not limited to one or more of marker panels, library screens, association studies, microarrays, gene chips, expression studies, or sequencing such as whole-genome resequencing and genotyping-by-sequencing (GB S) may be used. In some examples, no target-specific probe is needed, for example by using sequencing technologies, including but not limited to next-generation sequencing methods (see, for example, Metzker (2010) Nat Rev Genet 11:31-46; and, Egan et al. (2012) Am J Bot 99:175-185) such as sequencing by synthesis (e.g., Roche 454 pyrosequencing, Illumina Genome Analyzer, and Ion Torrent PGM or Proton systems), sequencing by ligation (e.g., SOLiD from Applied Biosystems, and Polnator system from Azco Biotech), and single molecule sequencing (SMS or third-generation sequencing) which eliminate template amplification (e.g., Helicos system, and PacBio RS system from Pacific BioSciences). Further technologies include optical sequencing systems (e.g., Starlight from Life Technologies), and nanopore sequencing (e.g., GridION from Oxford Nanopore Technologies). Each of these may be coupled with one or more enrichment strategies for organellar or nuclear genomes in order to reduce the complexity of the genome under investigation via PCR, hybridization, restriction enzyme (see, e.g., Elshire et al. (2011) PLoS ONE 6:e19379), and expression methods. In some examples, no reference genome sequence is needed in order to complete the analysis.

With any of the genotyping techniques mentioned herein, polymorphisms may be detected when the genotype and/or sequence of the plant of interest is compared to the genotype and/or sequence of one or more reference plants. The polymorphism revealed by these techniques may be used to establish links between genotype and phenotype. The polymorphisms may thus be used to predict or identify certain phenotypic characteristics, individuals, or even species. The polymorphisms are generally called markers. It is common practice for the skilled artisan to apply molecular DNA techniques for generating polymorphisms and creating markers. The polymorphisms of this invention may be provided in a variety of mediums to facilitate use, e.g., a database or computer readable medium, which may also contain descriptive annotations in a form that allows a skilled artisan to examine or query the polymorphisms and obtain useful information.

The invention further provides a method of determining the genotype of a plant of celery cultivar TBG 28, or a first-generation progeny thereof, comprising detecting in the genome of the plant at least a first polymorphism. The method may, in certain embodiments, comprise detecting a plurality of polymorphisms in the genome of the plant. The method may further comprise storing the results of the step of detecting the plurality of polymorphisms on a computer readable medium. The plurality of polymorphisms are indicative of and/or give rise to the expression of the morphological and physiological characteristics of celery cultivar TBG 28. The invention further provides a computer readable medium produced by such a method.

In some examples, a plant, a plant part, or a seed of celery cultivar TBG 28 may be characterized by producing a molecular profile. A molecular profile may include, but is not limited to, one or more genotypic and/or phenotypic profile(s). A genotypic profile may include, but is not limited to, a marker profile, such as a genetic map, a linkage map, a trait maker profile, a SNP profile, an SSR profile, a genome-wide marker profile, a haplotype, and the like. A molecular profile may also be a nucleic acid sequence profile, and/or a physical map. A phenotypic profile may include, but is not limited to, a protein expression profile, a metabolic profile, an mRNA expression profile, and the like.

SSR technology is currently the most efficient and practical marker technology; more marker loci can be routinely used and more alleles per marker locus can be found using SSRs in comparison to RFLPs. For example, Diwan and Cregan described a highly polymorphic microsatellite locus in soybean with as many as 26 alleles. Diwan, N. and Cregan, P. B., Theor. Appl. Genet., 95:22-225 (1997). SNPs may also be used to identify the unique genetic composition of the invention and progeny varieties retaining that unique genetic composition. Various molecular marker techniques may be used in combination to enhance overall resolution.

Molecular markers, which include markers identified through the use of techniques such as Isozyme Electrophoresis, RFLPs, RAPDs, AP-PCR, DAF, SCARs, AFLPs, SSRs, and SNPs, may be used in plant breeding. One use of molecular markers is Quantitative Trait Loci (QTL) mapping. QTL mapping is the use of markers which are known to be closely linked to alleles that have measurable effects on a quantitative trait. Selection in the breeding process is based upon the accumulation of markers linked to the positive effecting alleles and/or the elimination of the markers linked to the negative effecting alleles from the plant's genome.

Molecular markers can also be used during the breeding process for the selection of qualitative traits. For example, markers closely linked to alleles or markers containing sequences within the actual alleles of interest can be used to select plants that contain the alleles of interest during a backcrossing breeding program. The markers can also be used to select toward the genome of the recurrent parent and against the markers of the donor parent. This procedure attempts to minimize the amount of genome from the donor parent that remains in the selected plants. It can also be used to reduce the number of crosses back to the recurrent parent needed in a backcrossing program. The use of molecular markers in the selection process is often called genetic marker enhanced selection or marker-assisted selection. Molecular markers may also be used to identify and exclude certain sources of germplasm as parental varieties or ancestors of a plant by providing a means of tracking genetic profiles through crosses.

Particular markers used for these purposes are not limited to the set of markers disclosed herein, but may include any type of marker and marker profile which provides a means of distinguishing varieties. In addition to being used for identification of celery cultivar TBG 28, a hybrid produced through the use of TBG 28, and the identification or verification of pedigree for progeny plants produced through the use of TBG 28, a genetic marker profile is also useful in developing a gene conversion of TBG 28.

Means of performing genetic marker profiles using SNP and SSR polymorphisms are well known in the art. SNPs are genetic markers based on a polymorphism in a single nucleotide. A marker system based on SNPs can be highly informative in linkage analysis relative to other marker systems in that multiple alleles may be present.

The SSR profile of celery cultivar TBG 28 can be used to identify plants comprising celery cultivar TBG 28 as a parent, since such plants will comprise the same homozygous alleles as celery cultivar TBG 28. Because the celery variety is essentially homozygous at all relevant loci, most loci should have only one type of allele present. In contrast, a genetic marker profile of an F₁ progeny should be the sum of those parents, e.g., if one parent was homozygous for allele x at a particular locus, and the other parent homozygous for allele y at that locus, then the F₁ progeny will be xy (heterozygous) at that locus. Subsequent generations of progeny produced by selection and breeding are expected to be of genotype x (homozygous), y (homozygous), or xy (heterozygous) for that locus position. When the F₁ plant is selfed or sibbed for successive filial generations, the locus should be either x or y for that position.

In addition, plants and plant parts substantially benefiting from the use of celery cultivar TBG 28 in their development, such as celery cultivar TBG 28 comprising a gene conversion, backcross conversion, transgene, or genetic sterility factor, may be identified by having a molecular marker profile with a high percent identity to celery cultivar TBG 28. Such a percent identity might be 95%, 96%, 97%, 98%, 99%, 99.5%, or 99.9% identical to celery cultivar TBG 28.

The SSR profile of celery cultivar TBG 28 can also be used to identify essentially derived varieties and other progeny varieties developed from the use of celery cultivar TBG 28, as well as cells and other plant parts thereof. Such plants may be developed using the markers identified in WO 00/31964, U.S. Pat. Nos. 6,162,967, and 7,288,386. Progeny plants and plant parts produced using celery cultivar TBG 28 may be identified by having a molecular marker profile of at least 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 99.5% genetic contribution from celery cultivar TBG 28, as measured by either percent identity or percent similarity. Such progeny may be further characterized as being within a pedigree distance of celery cultivar TBG 28, such as within 1, 2, 3, 4, or 5 or less cross-pollinations to a celery plant other than celery cultivar TBG 28 or a plant that has celery cultivar TBG 28 as a progenitor. Unique molecular profiles may be identified with other molecular tools such as SNPs and RFLPs.

While determining the genotypic profile of the plants described supra, several unique SSR profiles may also be identified which did not appear in either parent of such plant. Such unique SSR profiles may arise during the breeding process from recombination or mutation. A combination of several unique alleles provides a means of identifying a plant variety, an F₁ progeny produced from such variety, and progeny produced from such variety.

Molecular data from TBG 28 may be used in a plant breeding process. Nucleic acids may be isolated from a seed of TBG 28 or from a plant, plant part, or cell produced by growing a seed of TBG 28, or from a seed of TBG 28 with a gene conversion, or from a plant, plant part, or cell of TBG 28 with a gene conversion. One or more polymorphisms may be isolated from the nucleic acids. A plant having one or more of the identified polymorphisms may be selected and used in a plant breeding method to produce another plant.

In another embodiment of the invention, the genetic complement of the celery cultivar TBG 28 is provided. The phrase “genetic complement” is used to refer to the aggregate of nucleotide sequences, the expression of which sequences defines the phenotype of, in the present case, a celery plant, or a cell or tissue of that plant. A genetic complement thus represents the genetic makeup of a cell, tissue or plant, and a hybrid genetic complement represents the genetic makeup of a hybrid cell, tissue or plant. The invention thus provides celery plant cells that have a genetic complement in accordance with the celery plant cells disclosed herein, and plants, seeds and plants containing such cells. Plant genetic complements may be assessed by genetic marker profiles, and by the expression of phenotypic traits that are characteristic of the expression of the genetic complement, e.g., isozyme typing profiles.

Introduction of a New Trait or Locus into Celery Cultivar TBG 28

Cultivar TBG 28 represents a new base genetic variety into which a new gene, locus or trait may be introgressed. Backcrossing and direct transformation represent two important methods that can be used to accomplish such an introgression.

Single Gene (Locus) Conversions

When the term “celery plant” is used in the context of the present invention, this also includes any single gene or locus conversions of that variety. The term “single locus converted plant” or “single gene converted plant” refers to those celery plants which are developed by backcrossing or genetic engineering, wherein essentially all of the desired morphological and physiological characteristics of a variety are recovered in addition to the one or more genes transferred into the variety via the backcrossing technique or genetic engineering. Backcrossing methods can be used with the present invention to improve or introduce a characteristic into the variety.

A backcross conversion of celery cultivar TBG 28 occurs when DNA sequences are introduced through backcrossing (Hallauer, et al., “Corn Breeding,” Corn and Corn Improvements, No. 18, pp. 463-481 (1988)), with celery cultivar TBG 28 utilized as the recurrent parent. Both naturally occurring and transgenic DNA sequences may be introduced through backcrossing techniques. A backcross conversion may produce a plant with a trait or locus conversion in at least two or more backcrosses, including at least 2 crosses, at least 3 crosses, at least 4 crosses, at least 5 crosses, and the like. Molecular marker assisted breeding or selection may be utilized to reduce the number of backcrosses necessary to achieve the backcross conversion. For example, see, Openshaw, S. J., et al., Marker-assisted Selection in Backcross Breeding, Proceedings Symposium of the Analysis of Molecular Data, Crop Science Society of America, Corvallis, Oregon (August 1994), where it is demonstrated that a backcross conversion can be made in as few as two backcrosses.

The complexity of the backcross conversion method depends on the type of trait being transferred (single genes or closely linked genes as compared to unlinked genes), the level of expression of the trait, the type of inheritance (cytoplasmic or nuclear), and the types of parents included in the cross. It is understood by those of ordinary skill in the art that for single gene traits that are relatively easy to classify, the backcross method is effective and relatively easy to manage. (See, Hallauer, et al., Corn and Corn Improvement, Sprague and Dudley, Third Ed. (1998)). Desired traits that may be transferred through backcross conversion include, but are not limited to, sterility (nuclear and cytoplasmic), fertility restoration, nutritional enhancements, drought tolerance, nitrogen utilization, altered fatty acid profile, modified fatty acid metabolism, modified carbohydrate metabolism, industrial enhancements, yield stability, yield enhancement, disease resistance (bacterial, fungal, or viral), insect resistance, and herbicide resistance. In addition, an introgression site itself, such as an FRT site, Lox site, or other site-specific integration site, may be inserted by backcrossing and utilized for direct insertion of one or more genes of interest into a specific plant variety.

A single locus may contain several transgenes, such as a transgene for disease resistance that, in the same expression vector, also contains a transgene for herbicide resistance. The gene for herbicide resistance may be used as a selectable marker and/or as a phenotypic trait. A single locus conversion of site-specific integration system allows for the integration of multiple genes at a known recombination site in the genome. At least one, at least two or at least three and less than ten, less than nine, less than eight, less than seven, less than six, less than five or less than four locus conversions may be introduced into the plant by backcrossing, introgression or transformation to express the desired trait, while the plant, or a plant grown from the seed, plant part or plant cell, otherwise retains the phenotypic characteristics of the deposited seed when grown under the same environmental conditions.

The backcross conversion may result from either the transfer of a dominant allele or a recessive allele. Selection of progeny containing the trait of interest is accomplished by direct selection for a trait associated with a dominant allele. Transgenes transferred via backcrossing typically function as a dominant single gene trait and are relatively easy to classify. Selection of progeny for a trait that is transferred via a recessive allele requires growing and selfing the first backcross generation to determine which plants carry the recessive alleles. Recessive traits may require additional progeny testing in successive backcross generations to determine the presence of the locus of interest. The last backcross generation is usually selfed to give pure breeding progeny for the gene(s) being transferred, although a backcross conversion with a stably introgressed trait may also be maintained by further backcrossing to the recurrent parent with selection for the converted trait.

Along with selection for the trait of interest, progeny are selected for the phenotype of the recurrent parent. The backcross is a form of inbreeding, and the features of the recurrent parent are automatically recovered after successive backcrosses. Poehlman, Breeding Field Crops, p. 204 (1987). Poehlman suggests from one to four or more backcrosses, but as noted above, the number of backcrosses necessary can be reduced with the use of molecular markers. Other factors, such as a genetically similar donor parent, may also reduce the number of backcrosses necessary. As noted by Poehlman, backcrossing is easiest for simply inherited, dominant, and easily recognized traits.

One process for adding or modifying a trait or locus in celery cultivar TBG 28 comprises crossing celery cultivar TBG 28 plants grown from celery cultivar TBG 28 seed with plants of another celery variety that comprise the desired trait, gene or locus, selecting F₁ progeny plants that comprise the desired trait, gene or locus to produce selected F₁ progeny plants, crossing the selected progeny plants with the celery cultivar TBG 28 plants to produce backcross progeny plants, selecting for backcross progeny plants that have the desired trait, gene or locus and the morphological characteristics of celery cultivar TBG 28 to produce selected backcross progeny plants, and backcrossing to celery cultivar TBG 28 three or more times in succession to produce selected fourth or higher backcross progeny plants that comprise said trait, gene or locus. The modified celery cultivar TBG 28 may be further characterized as having the physiological and morphological characteristics of celery cultivar TBG 28 as determined at the 5% significance level when grown in the same environmental conditions and/or may be characterized by percent similarity or identity to celery cultivar TBG 28 as determined by SSR markers. The above method may be utilized with fewer backcrosses in appropriate situations, such as when the donor parent is highly related or markers are used in the selection step. Desired traits that may be used include those nucleic acids known in the art, some of which are listed herein, that will affect traits through nucleic acid expression or inhibition. Desired loci include the introgression of FRT, Lox, and other sites for site specific integration, which may also affect a desired trait if a functional nucleic acid is inserted at the integration site.

In addition, the above process and other similar processes described herein may be used to produce first generation progeny celery seed by adding a step at the end of the process that comprises crossing celery cultivar TBG 28 with the introgressed trait or locus with a different celery plant and harvesting the resultant first generation progeny celery seed.

Methods for Genetic Engineering of Celery

With the advent of molecular biological techniques that have allowed the isolation and characterization of genes that encode specific protein products, scientists in the field of plant biology developed a strong interest in engineering the genome of plants (genetic engineering) to contain and express foreign genes, or additional, or modified versions of native, or endogenous genes (perhaps driven by different promoters) in order to alter the traits of a plant in a specific manner. Plants altered by genetic engineering are often referred to as ‘genetically modified’. Any DNA sequences, whether from a different species or from the same species, which are introduced into the genome using transformation and/or various breeding methods, are referred to herein collectively as “transgenes.” Over the last fifteen to twenty years several methods for producing transgenic plants have been developed, and the present invention, in particular embodiments, also relates to transformed versions of the claimed cultivar.

Vectors used for the transformation of celery cells are not limited so long as the vector can express an inserted DNA in the cells. For example, vectors comprising promoters for constitutive gene expression in celery cells (e.g., cauliflower mosaic virus 35S promoter) and promoters inducible by exogenous stimuli can be used. Examples of suitable vectors include pBI binary vector. The “celery cell” into which the vector is to be introduced includes various forms of celery cells, such as cultured cell suspensions, protoplasts, leaf sections, and callus. A vector can be introduced into celery cells by known methods, such as the polyethylene glycol method, polycation method, electroporation, Agrobacterium-mediated transfer, particle bombardment and direct DNA uptake by protoplasts. See, e.g., Pang et al. (The Plant J., 9, 899-909, 1996).

Numerous methods for plant transformation have been developed, including biological and physical, plant transformation protocols. See, for example, Miki, et al., “Procedures for Introducing Foreign DNA into Plants” in Methods in Plant Molecular Biology and Biotechnology, Glick and Thompson (Eds.), CRC Press, Inc., Boca Raton, pp. 67-88 (1993). In addition, expression vectors and in vitro culture methods for plant cell or tissue transformation and regeneration of plants are available. See, for example, Gruber, et al., “Vectors for Plant Transformation” in Methods in Plant Molecular Biology and Biotechnology, Glick and Thompson (Eds.), CRC Press, Inc., Boca Raton, pp. 89-119 (1993).

A. Agrobacterium-Mediated Transformation:

One method for introducing an expression vector into plants is based on the natural transformation system of Agrobacterium. See, for example, Horsch, et al., Science, 227:1229 (1985). A. tumefaciens and A. rhizogenes are plant pathogenic soil bacteria which genetically transform plant cells. The Ti and Ri plasmids of A. tumefaciens and A. rhizogenes, respectively, carry genes responsible for genetic transformation of the plant. See, for example, Kado, C. I., Crit. Rev. Plant Sci., 10:1 (1991). Descriptions of Agrobacterium vector systems and methods for Agrobacterium-mediated gene transfer are provided by Gruber, et al., supra, Miki, et al., supra, and Moloney, et al., Plant Cell Rep., 8:238 (1989). See also, U.S. Pat. No. 5,563,055 (Townsend and Thomas), issued Oct. 8, 1996.

Agrobacterium-mediated transfer is a widely applicable system for introducing gene loci into plant cells, including celery. An advantage of the technique is that DNA can be introduced into whole plant tissues, thereby bypassing the need for regeneration of an intact plant from a protoplast. Modern Agrobacterium transformation vectors are capable of replication in E. coli as well as Agrobacterium, allowing for convenient manipulations (Klee et al., Bio. Tech., 3(7):637-642, 1985). Moreover, recent technological advances in vectors for Agrobacterium-mediated gene transfer have improved the arrangement of genes and restriction sites in the vectors to facilitate the construction of vectors capable of expressing various polypeptide coding genes. The vectors described have convenient multi-linker regions flanked by a promoter and a polyadenylation site for direct expression of inserted polypeptide coding genes. Additionally, Agrobacterium containing both armed and disarmed Ti genes can be used for transformation.

In those plant strains where Agrobacterium-mediated transformation is efficient, it is the method of choice because of the facile and defined nature of the gene locus transfer. The use of Agrobacterium-mediated plant integrating vectors to introduce DNA into plant cells is well known in the art (Fraley et al., Bio. Tech., 3(7):629-635, 1985; U.S. Pat. No. 5,563,055). For example, U.S. Pat. No. 5,349,124 describes a method of transforming celery plant cells using Agrobacterium-mediated transformation. By inserting a chimeric gene having a DNA coding sequence encoding for the full-length B.t. toxin protein that expresses a protein toxic toward Lepidopteran larvae, this methodology resulted in celery having resistance to such insects.

B. Direct Gene Transfer:

Several methods of plant transformation, collectively referred to as direct gene transfer, have been developed as an alternative to Agrobacterium-mediated transformation. A generally applicable method for delivering transforming DNA segments to plant cells is microprojectile-mediated transformation, or microprojectile bombardment. In this method, particles are coated with nucleic acids and delivered into cells by a propelling force. Sanford, et al., Part. Sci. Technol., 5:27 (1987); Sanford, J. C., Trends Biotech., 6:299 (1988); Klein, et al., Bio/technology, 6:559-563 (1988); Sanford, J. C., Physiol Plant, 7:206 (1990); Klein, et al., Bio/technology, 10:268 (1992). See also, U.S. Pat. No. 5,015,580 (Christou, et al.), issued May 14, 1991; U.S. Pat. No. 5,322,783 (Tomes, et al.), issued Jun. 21, 1994.

Another method for physical delivery of DNA to plants is sonication of target cells. Zhang, et al., Bio/technology, 9:996 (1991). Alternatively, liposome and spheroplast fusion have been used to introduce expression vectors into plants. Deshayes, et al., EMBO J., 4:2731 (1985); Christou, et al., PNAS, 84:3962 (1987). Direct uptake of DNA into protoplasts using CaCl₂) precipitation, calcium phosphate precipitation, polyethylene glycol treatment, polyvinyl alcohol, or poly-L-ornithine has also been reported. See, e.g., Potrykus et al., Mol. Gen. Genet., 199:183-188, 1985; Omirulleh et al., Plant Mol. Biol., 21(3):415-428, 1993; Fromm et al., Nature, 312:791-793, 1986; Uchimiya et al., Mol. Gen. Genet., 204:204, 1986; Marcotte et al., Nature, 335:454, 1988; Hain, et al., Mol. Gen. Genet., 199:161, 1985 and Draper, et al., Plant Cell Physiol. 23:451, 1982.

Electroporation of protoplasts and whole cells and tissues has also been described. Donn, et al., In Abstracts of VIIth International Congress on Plant Cell and Tissue Culture IAPTC, A2-38, p. 53, 1990; D'Halluin, et al., Plant Cell, 4:1495-1505, 1992; and Spencer, et al., Plant Mol. Biol., 24:51-61, 1994. Another illustrative embodiment of a method for delivering DNA into plant cells by acceleration is the Biolistics Particle Delivery System, which can be used to propel particles coated with DNA or cells through a screen, such as a stainless steel or Nytex screen, onto a surface covered with target celery cells.

Transformation of plants and expression of foreign genetic elements is exemplified in Choi et al., Plant Cell Rep., 13: 344-348, 1994 and Ellul et al., Theor. Appl. Genet., 107:462-469, 2003.

Following transformation of celery target tissues, expression of selectable marker genes allows for preferential selection of transformed cells, tissues, and/or plants, using regeneration and selection methods now well known in the art.

The methods described herein for transformation would typically be used for producing a transgenic variety. The transgenic variety could then be crossed, with another (non-transformed or transformed) variety, in order to produce a new transgenic variety. Alternatively, a genetic trait which has been engineered into a particular celery cultivar using the transformation techniques described could be moved into another cultivar using traditional backcrossing techniques that are well known in the plant breeding arts. For example, a backcrossing approach could be used to move an engineered trait from a public, non-elite variety into an elite variety, or from a variety containing a foreign gene in its genome into a variety or varieties which do not contain that gene. As used herein, “crossing” can refer to a simple X by Y cross, or the process of backcrossing, depending on the context.

Expression Vectors for Celery Transformation: Marker Genes

Expression vectors include at least one genetic marker, operably linked to a regulatory element (a promoter, for example) that allows transformed cells containing the marker to be either recovered by negative selection, i.e., inhibiting growth of cells that do not contain the selectable marker gene, or by positive selection, i.e., screening for the product encoded by the genetic marker. Many commonly used selectable marker genes for plant transformation are well known in the transformation arts, and include, for example, genes that code for enzymes that metabolically detoxify a selective chemical agent which may be an antibiotic or a herbicide, or genes that encode an altered target which is insensitive to the inhibitor. A few positive selection methods are also known in the art.

One commonly used selectable marker gene for plant transformation is the neomycin phosphotransferase II (nptII) gene, isolated from transposon Tn5, which when placed under the control of plant regulatory signals which confers resistance to kanamycin. Fraley et al., Proc. Natl. Acad. Sci. U.S.A., 80:4803 (1983). Another commonly used selectable marker gene is the hygromycin phosphotransferase gene which confers resistance to the antibiotic hygromycin. Vanden Elzen et al., Plant Mol. Biol., 5:299 (1985).

Additional selectable marker genes of bacterial origin that confer resistance to antibiotics include gentamycin acetyl transferase, streptomycin phosphotransferase, aminoglycoside-3′-adenyl transferase, the bleomycin resistance determinant. Hayford et al., Plant Physiol. 86:1216 (1988), Jones et al., Mol. Gen. Genet., 210:86 (1987), Svab et al., Plant Mol. Biol. 14:197 (1990) Hille et al., Plant Mol. Biol. 7:171 (1986). Other selectable marker genes confer resistance to herbicides such as glyphosate, glufosinate or bromoxynil. Comai et al., Nature 317:741-744 (1985), Gordon-Kamm et al., Plant Cell 2:603-618 (1990) and Stalker et al., Science 242:419-423 (1988). Selectable marker genes for plant transformation not of bacterial origin include, for example, mouse dihydrofolate reductase, plant 5-enolpyruvylshikimate-3-phosphate synthase and plant acetolactate synthase. Eichholtz et al., Somatic Cell Mol. Genet. 13:67 (1987), Shah et al., Science 233:478 (1986), Charest et al., Plant Cell Rep. 8:643 (1990).

Another class of marker genes for plant transformation requires screening of presumptively transformed plant cells rather than direct genetic selection of transformed cells for resistance to a toxic substance such as an antibiotic. These genes are particularly useful to quantify or visualize the spatial pattern of expression of a gene in specific tissues and are frequently referred to as reporter genes because they can be fused to a gene or gene regulatory sequence for the investigation of gene expression. Commonly used genes for screening presumptively transformed cells include α-glucuronidase (GUS, α-galactosidase, luciferase and chloramphenicol, acetyltransferase. Jefferson, R. A., Plant Mol. Biol. Rep. 5:387 (1987), Teeri et al., EMBO J. 8:343 (1989), Koncz et al., Proc. Natl. Acad. Sci U.S.A. 84:131 (1987), DeBlock et al., EMBO J. 3:1681 (1984).

In vivo methods for visualizing GUS activity that do not require destruction of plant tissue are available. Molecular Probes publication 2908, IMAGENE GREEN, p. 1-4 (1993) and Naleway et al., J. Cell Biol. 115:151a (1991). However, these in vivo methods for visualizing GUS activity have not proven useful for recovery of transformed cells because of low sensitivity, high fluorescent backgrounds and limitations associated with the use of luciferase genes as selectable markers.

More recently, a gene encoding Green Fluorescent Protein (GFP) has been utilized as a marker for gene expression in prokaryotic and eukaryotic cells. Chalfie et al., Science 263:802 (1994). GFP and mutants of GFP may be used as screenable markers.

Expression Vectors for Celery Transformation: Promoters

Genes included in expression vectors must be driven by a nucleotide sequence comprising a regulatory element, for example, a promoter. Several types of promoters are now well known in the transformation arts, as are other regulatory elements that can be used alone or in combination with promoters.

As used herein, “promoter” includes reference to a region of DNA upstream from the start of transcription and involved in recognition and binding of RNA polymerase and other proteins to initiate transcription. A “plant promoter” is a promoter capable of initiating transcription in plant cells. Examples of promoters under developmental control include promoters that preferentially initiate transcription in certain tissues, such as leaves, roots, seeds, fibers, xylem vessels, tracheids, or sclerenchyma. Such promoters are referred to as “tissue-preferred”. Promoters which initiate transcription only in certain tissue are referred to as “tissue-specific”. A “cell type” specific promoter primarily drives expression in certain cell types in one or more organs, for example, vascular cells in roots or leaves. An “inducible” promoter is a promoter which is under environmental control. Examples of environmental conditions that may effect transcription by inducible promoters include anaerobic conditions or the presence of light. Tissue-specific, tissue-preferred, cell type specific, and inducible promoters constitute the class of “non-constitutive” promoters. A “constitutive” promoter is a promoter which is active under most environmental conditions.

A. Inducible Promoters:

An inducible promoter is operably linked to a gene for expression in celery. Optionally, the inducible promoter is operably linked to a nucleotide sequence encoding a signal sequence which is operably linked to a gene for expression in celery. With an inducible promoter the rate of transcription increases in response to an inducing agent.

Any inducible promoter can be used in the instant invention. See Ward et al., Plant Mol. Biol. 22:361-366 (1993). Exemplary inducible promoters include, but are not limited to, that from the ACEI system which responds to copper (Meft et al., PNAS 90:4567-4571 (1993)); In2 gene from maize which responds to benzenesulfonamide herbicide safeners (Hershey et al., Mol. Gen Genetics 227:229-237 (1991) and Gatz et al., Mol. Gen. Genetics 243:32-38 (1994)) or Tet repressor from Tn10 (Gatz et al., Mol. Gen. Genetics 227:229-237 (1991). A particularly preferred inducible promoter is a promoter that responds to an inducing agent to which plants do not normally respond. An exemplary inducible promoter is the inducible promoter from a steroid hormone gene, the transcriptional activity of which is induced by a glucocorticosteroid hormone. Schena et al., Proc. Natl. Acad. Sci. U.S.A. 88:0421 (1991).

B. Constitutive Promoters:

A constitutive promoter is operably linked to a gene for expression in celery or the constitutive promoter is operably linked to a nucleotide sequence encoding a signal sequence which is operably linked to a gene for expression in celery.

Many different constitutive promoters can be utilized in the instant invention. Exemplary constitutive promoters include, but are not limited to, the promoters from plant viruses such as the 35S promoter from CaMV (Odell et al., Nature 313:810-812 (1985) and the promoters from such genes as rice actin (McElroy et al., Plant Cell 2:163-171 (1990)); ubiquitin (Christensen et al., Plant Mol. Biol. 12:619-632 (1989) and Christensen et al., Plant Mol. Biol. 18:675-689 (1992)); pEMU (Last et al., Theor. Appl. Genet. 81:581-588 (1991)); MAS (Velten et al., EMBO J. 3:2723-2730 (1984)) and maize H3 histone (Lepetit et al., Mol. Gen. Genetics 231:276-285 (1992) and Atanassova et al., Plant Journal 2 (3): 291-300 (1992)). The ALS promoter, Xbal/Ncol fragment 5′ to the Brassica napus ALS3 structural gene (or a nucleotide sequence similarity to said Xbal/Ncol fragment), represents a particularly useful constitutive promoter. See PCT application WO 96/30530.

C. Tissue-Specific or Tissue-Preferred Promoters:

A tissue-specific promoter is operably linked to a gene for expression in celery. Optionally, the tissue-specific promoter is operably linked to a nucleotide sequence encoding a signal sequence which is operably linked to a gene for expression in celery. Plants transformed with a gene of interest operably linked to a tissue-specific promoter produce the protein product of the transgene exclusively, or preferentially, in a specific tissue.

Any tissue-specific or tissue-preferred promoter can be utilized in the instant invention. Exemplary tissue-specific or tissue-preferred promoters include, but are not limited to, a root-preferred promoter, such as that from the phaseolin gene (Murai et al., Science 23:476-482 (1983) and Sengupta-Gopalan et al., Proc. Natl. Acad. Sci. U.S.A. 82:3320-3324 (1985)); a leaf-specific and light-induced promoter such as that from cab or rubisco (Simpson et al., EMBO J. 4(11):2723-2729 (1985) and Timko et al., Nature 318:579-582 (1985)); an anther-specific promoter such as that from LAT52 (Twell et al., Mol. Gen. Genetics 217:240-245 (1989)); a pollen-specific promoter such as that from Zm13 (Guerrero et al., Mol. Gen. Genetics 244:161-168 (1993)) or a microspore-preferred promoter such as that from apg (Twell et al., Sex. Plant Reprod. 6:217-224 (1993)).

Signal Sequences for Targeting Proteins to Subcellular Compartments

Transport of protein produced by transgenes to a subcellular compartment such as the chloroplast, vacuole, peroxisome, glyoxysome, cell wall or mitochondrion or for secretion into the apoplast, is accomplished by means of operably linking the nucleotide sequence encoding a signal sequence to the 5′ and/or 3′ region of a gene encoding the protein of interest. Targeting sequences at the 5′ and/or 3′ end of the structural gene may determine, during protein synthesis and processing, where the encoded protein is ultimately compartmentalized.

The presence of a signal sequence directs a polypeptide to either an intracellular organelle or subcellular compartment or for secretion to the apoplast. Many signal sequences are known in the art. See, for example Becker et al., Plant Mol. Biol. 20:49 (1992), Close, P. S., Master's Thesis, Iowa State University (1993), Knox, C., et al., “Structure and Organization of Two Divergent Alpha-Amylase Genes from Barley”, Plant Mol. Biol. 9:3-17 (1987), Lerner et al., Plant Physiol. 91:124-129 (1989), Fontes et al., Plant Cell 3:483-496 (1991), Matsuoka et al., Proc. Natl. Acad. Sci. 88:834 (1991), Gould et al., J. Cell. Biol. 108:1657 (1989), Creissen et al., Plant J. 2:129 (1991), Kalderon, et al., A short amino acid sequence able to specify nuclear location, Cell 39:499-509 (1984), Steifel, et al., Expression of a maize cell wall hydroxyproline-rich glycoprotein gene in early leaf and root vascular differentiation, Plant Cell 2:785-793 (1990).

Additional Methods for Genetic Engineering of Celery

In general, methods to transform, modify, edit or alter plant endogenous genomic DNA include altering the plant native DNA sequence or a pre-existing transgenic sequence including regulatory elements, coding and non-coding sequences. These methods can be used, for example, to target nucleic acids to pre-engineered target recognition sequences in the genome. Such pre-engineered target sequences may be introduced by genome editing or modification. As an example, a genetically modified plant variety is generated using “custom” or engineered endonucleases such as meganucleases produced to modify plant genomes (see e.g., WO 2009/114321; Gao et al. (2010) Plant Journal 1:176-187). Another site-directed engineering method is through the use of zinc finger domain recognition coupled with the restriction properties of restriction enzyme. See e.g., Urnov, et al., (2010) Nat Rev Genet. 11(9):636-46; Shukla, et al., (2009) Nature 459 (7245):437-41. A transcription activator-like (TAL) effector-DNA modifying enzyme (TALE or TALEN) is also used to engineer changes in plant genome. See e.g., US20110145940, Cermak et al., (2011) Nucleic Acids Res. 39(12) and Boch et al., (2009), Science 326(5959): 1509-12. Site-specific modification of plant genomes can also be performed using the bacterial type II CRISPR (clustered regularly interspaced short palindromic repeats)/Cas (CRISPR-associated) system, as well as similar CRISPR related technologies. See e.g., Belhaj et al., (2013), Plant Methods 9: 39; The Cas9/guide RNA-based system allows targeted cleavage of genomic DNA guided by a customizable small noncoding RNA in plants (see e.g., WO 2015026883A1, incorporated herein by reference).

A genetic map can be generated that identifies the approximate chromosomal location of an integrated DNA molecule, for example via conventional restriction fragment length polymorphisms (RFLP), polymerase chain reaction (PCR) analysis, simple sequence repeats (SSR), and single nucleotide polymorphisms (SNP). For exemplary methodologies in this regard, see Glick and Thompson, Methods in Plant Molecular Biology and Biotechnology, pp. 269-284 (CRC Press, Boca Raton, 1993).

Wang et al. discuss “Large Scale Identification, Mapping and Genotyping of Single-Nucleotide Polymorphisms in the Human Genome”, Science (1998) 280:1077-1082, and similar capabilities are increasingly available for the celery genome. Map information concerning chromosomal location is useful for proprietary protection of a subject transgenic plant. If unauthorized propagation is undertaken and crosses made with other germplasm, the map of the integration region can be compared to similar maps for suspect plants to determine if the latter have a common parentage with the subject plant. Map comparisons could involve hybridizations, RFLP, PCR, SSR, sequencing or combinations thereof, all of which are conventional techniques. SNPs may also be used alone or in combination with other techniques.

Celery Cultivar TBG 28 Further Comprising a Transgene

Transgenes and transformation methods provide means to engineer the genome of plants to contain and express heterologous genetic elements, including but not limited to foreign genetic elements, additional copies of endogenous elements, and/or modified versions of native or endogenous genetic elements, in order to alter at least one trait of a plant in a specific manner. Any heterologous DNA sequence(s), whether from a different species or from the same species, which are inserted into the genome using transformation, backcrossing, or other methods known to one of skill in the art are referred to herein collectively as transgenes. The sequences are heterologous based on sequence source, location of integration, operably linked elements, or any combination thereof. One or more transgenes of interest can be introduced into celery cultivar TBG 28. Transgenic variants of celery cultivar TBG 28 plants, seeds, cells, and parts thereof or derived therefrom are provided. Transgenic variants of TBG 28 comprise the physiological and morphological characteristics of celery cultivar TBG 28, such as determined at the 5% significance level when grown in the same environmental conditions, and/or may be characterized or identified by percent similarity or identity to TBG 28 as determined by SSR or other molecular markers. In some examples, transgenic variants of celery cultivar TBG 28 are produced by introducing at least one transgene of interest into celery cultivar TBG 28 by transforming TBG 28 with a polynucleotide comprising the transgene of interest. In other examples, transgenic variants of celery cultivar TBG 28 are produced by introducing at least one transgene by introgressing the transgene into celery cultivar TBG 28 by crossing.

In one example, a process for modifying celery cultivar TBG 28 with the addition of a desired trait, said process comprising transforming a celery plant of cultivar TBG 28 with a transgene that confers a desired trait is provided. Therefore, transgenic TBG 28 celery cells, plants, plant parts, and seeds produced from this process are provided. In some examples one more desired traits may include traits such as sterility (nuclear and cytoplasmic), fertility restoration, nutritional enhancements, drought tolerance, nitrogen utilization, altered fatty acid profile, modified fatty acid metabolism, modified carbohydrate metabolism, industrial enhancements, yield stability, yield enhancement, disease resistance (bacterial, fungal, or viral), insect resistance, and herbicide resistance. The specific gene may be any known in the art or listed herein, including but not limited to a polynucleotide conferring resistance to an ALS-inhibitor herbicide, imidazolinone, sulfonylurea, protoporphyrinogen oxidase (PPO) inhibitors, hydroxyphenyl pyruvate dioxygenase (HPPD) inhibitors, glyphosate, glufosinate, triazine, 2,4-dichlorophenoxyacetic acid (2,4-D), dicamba, broxynil, metribuzin, or benzonitrile herbicides; a polynucleotide encoding a Bacillus thuringiensis polypeptide, a polynucleotide encoding a phytase, a fatty acid desaturase (e.g., FAD-2, FAD-3), galactinol synthase, a raffinose synthetic enzyme; or a polynucleotide conferring resistance to tipburn, Fusarium oxysporum, Nasonovia ribisnigri, Sclerotinia sclerotiorum or other plant pathogens.

Foreign Protein Genes and Agronomic Genes

By means of the present invention, plants can be genetically engineered to express various phenotypes of agronomic interest. Through the transformation of celery, the expression of genes can be altered to enhance disease resistance, insect resistance, herbicide resistance, agronomic, nutritional quality, and other traits. Transformation can also be used to insert DNA sequences which control or help control male-sterility. DNA sequences native to celery, as well as non-native DNA sequences, can be transformed into celery and used to alter levels of native or non-native proteins. Various promoters, targeting sequences, enhancing sequences, and other DNA sequences can be inserted into the genome for the purpose of altering the expression of proteins. Reduction of the activity of specific genes (also known as gene silencing or gene suppression) is desirable for several aspects of genetic engineering in plants.

Many techniques for gene silencing are well known to one of skill in the art, including, but not limited to, knock-outs (such as by insertion of a transposable element such as mu (Vicki Chandler, The Maize Handbook, Ch. 118 (Springer-Verlag 1994)) or other genetic elements such as a FRT and Lox that are used for site specific integrations, antisense technology (see, e.g., Sheehy, et al., PNAS USA, 85:8805-8809 (1988); and U.S. Pat. Nos. 5,107,065, 5,453,566, and 5,759,829); co-suppression (e.g., Taylor, Plant Cell, 9:1245 (1997); Jorgensen, Trends Biotech., 8(12):340-344 (1990); Flavell, PNAS USA, 91:3490-3496 (1994); Finnegan, et al., Bio/Technology, 12:883-888 (1994); Neuhuber, et al., Mol. Gen. Genet., 244:230-241 (1994)); RNA interference (Napoli, et al., Plant Cell, 2:279-289 (1990); U.S. Pat. No. 5,034,323; Sharp, Genes Dev., 13:139-141 (1999); Zamore, et al., Cell, 101:25-33 (2000); Montgomery, et al., PNAS USA, 95:15502-15507 (1998)), virus-induced gene silencing (Burton, et al., Plant Cell, 12:691-705 (2000); Baulcombe, Curr. Op. Plant Bio., 2:109-113 (1999)); target-RNA-specific ribozymes (Haseloff, et al., Nature, 334: 585-591 (1988)); hairpin structures (Smith, et al., Nature, 407:319-320 (2000); WO 99/53050; WO 98/53083); MicroRNA (Aukerman & Sakai, Plant Cell, 15:2730-2741 (2003)); ribozymes (Steinecke, et al., EMBO J., 11:1525 (1992); Perriman, et al., Antisense Res. Dev., 3:253 (1993)); oligonucleotide mediated targeted modification (e.g., WO 03/076574 and WO 99/25853); Zn-finger targeted molecules (e.g., WO 01/52620, WO 03/048345, and WO 00/42219); and other methods or combinations of the above methods known to those of skill in the art.

Likewise, by means of the present invention, agronomic genes can be expressed in transformed plants. More particularly, plants can be genetically engineered to express various phenotypes of agronomic interest. Exemplary nucleotide sequences and/or native loci that confer at least one trait of interest, which optionally may be conferred or altered by genetic engineering, transformation or introgression of a transformed event include, but are not limited to, those categorized below:

1. Genes that Confer Resistance to Pests or Disease and that Encode:

A. Plant disease resistance genes. Plant defenses are often activated by specific interaction between the product of a disease resistance gene (R) in the plant and the product of a corresponding avirulence (Avr) gene in the pathogen. A plant line can be transformed with a cloned resistance gene to engineer plants that are resistant to specific pathogen strains. See, for example Jones et al., Science 266:789 (1994) (cloning of the tomato Cf-9 gene for resistance to Cladosporium fulvum); Martin et al., Science 262:1432 (1993) (tomato Pto gene for resistance to Pseudomonas syringae pv. Tomato encodes a protein kinase); Mindrinos et al., Cell 78:1089 (1994) (Arabidopsis RSP2 gene for resistance to Pseudomonas syringae).

B. A Bacillus thuringiensis protein, a derivative thereof or a synthetic polypeptide modeled thereon. See, for example, Geiser et al., Gene 48:109 (1986), who disclose the cloning and nucleotide sequence of a Bt δ-endotoxin gene. Moreover, DNA molecules encoding 6-endotoxin genes can be purchased from American Type Culture Collection, Manassas, Virginia, for example, under ATCC Accession Nos. 40098, 67136, 31995 and 31998.

C. A lectin. See, for example, the disclosure by Van Damme et al., Plant Molec. Biol. 24:25 (1994), who disclose the nucleotide sequences of several Clivia miniata mannose-binding lectin genes.

D. A vitamin-binding protein such as avidin. See PCT application US93/06487, the contents of which are hereby incorporated by reference. The application teaches the use of avidin and avidin homologues as larvicides against insect pests.

E. An enzyme inhibitor, for example, a protease or proteinase inhibitor or an amylase inhibitor. See, for example, Abe et al., J. Biol. Chem. 262:16793 (1987) (nucleotide sequence of rice cysteine proteinase inhibitor), Huub et al., Plant Molec. Biol. 21:985 (1993) (nucleotide sequence of cDNA encoding tobacco proteinase inhibitor I), Sumitani et al., Biosci. Biotech. Biochem. 57:1243 (1993) (nucleotide sequence of Streptomyces nitrosporeus α-amylase inhibitor).

F. An insect-specific hormone or pheromone such as an ecdysteroid and juvenile hormone, a variant thereof, a mimetic based thereon, or an antagonist or agonist thereof. See, for example, the disclosure by Hammock et al., Nature 344:458 (1990), of baculovirus expression of cloned juvenile hormone esterase, an inactivator of juvenile hormone.

G. An insect-specific peptide or neuropeptide which, upon expression, disrupts the physiology of the affected pest. For example, see the disclosures of Regan, J. Biol. Chem. 269:9 (1994) (expression cloning yields DNA coding for insect diuretic hormone receptor), and Pratt et al., Biochem. Biophys. Res. Comm. 163:1243 (1989) (an allostatin is identified in Diploptera puntata). See also U.S. Pat. No. 5,266,317 to Tomalski et al., who disclose genes encoding insect-specific, paralytic neurotoxins.

H. An insect-specific venom produced in nature by a snake, a wasp, etc. For example, see Pang et al., Gene 116:165 (1992), for disclosure of heterologous expression in plants of a gene coding for a scorpion insectotoxic peptide.

I. An enzyme responsible for a hyper accumulation of a monoterpene, a sesquiterpene, a steroid, hydroxamic acid, a phenylpropanoid derivative or another non-protein molecule with insecticidal activity.

J. An enzyme involved in the modification, including the post-translational modification, of a biologically active molecule; for example, a glycolytic enzyme, a proteolytic enzyme, a lipolytic enzyme, a nuclease, a cyclase, a transaminase, an esterase, a hydrolase, a phosphatase, a kinase, a phosphorylase, a polymerase, an elastase, a chitinase and a glucanase, whether natural or synthetic. See PCT application WO 93/02197 in the name of Scott et al., which discloses the nucleotide sequence of a callase gene. DNA molecules which contain chitinase-encoding sequences can be obtained, for example, from ATCC under Accession Nos. 39637 and 67152. See also Kramer et al., Insect Biochem. Molec. Biol. 23:691 (1993), who teach the nucleotide sequence of a cDNA encoding tobacco hookworm chitinase, and Kawalleck et al., Plant Molec. Biol. 21:673 (1993), who provide the nucleotide sequence of the parsley ubi4-2 polyubiquitin gene.

K. A molecule that stimulates signal transduction. For example, see the disclosure by Botella et al., Plant Molec. Biol. 24:757 (1994), of nucleotide sequences for mung bean calmodulin cDNA clones, and Griess et al., Plant Physiol. 104:1467 (1994), who provide the nucleotide sequence of a maize calmodulin cDNA clone.

L. A hydrophobic moment peptide. See PCT application WO 95/16776 (disclosure of peptide derivatives of Tachyplesin which inhibit fungal plant pathogens) and PCT application WO 95/18855 (teaches synthetic antimicrobial peptides that confer disease resistance), the respective contents of which are hereby incorporated by reference.

M. A membrane permease, a channel former or a channel blocker. For example, see the disclosure of Jaynes et al., Plant Sci 89:43 (1993), of heterologous expression of a cecropin-β, lytic peptide analog to render transgenic tobacco plants resistant to Pseudomonas solanacearum.

N. A viral-invasive protein or a complex toxin derived therefrom. For example, the accumulation of viral coat proteins in transformed plant cells imparts resistance to viral infection and/or disease development effected by the virus from which the coat protein gene is derived, as well as by related viruses. See Beachy et al., Ann. rev. Phytopathol. 28:451 (1990). Coat protein-mediated resistance has been conferred upon transformed plants against alfalfa mosaic virus, cucumber mosaic virus, tobacco streak virus, potato virus X, potato virus Y, tobacco etch virus, tobacco rattle virus and tobacco mosaic virus. Id.

O. An insect-specific antibody or an immunotoxin derived therefrom. Thus, an antibody targeted to a critical metabolic function in the insect gut would inactivate an affected enzyme, killing the insect. Cf. Taylor et al., Abstract #497, Seventh Int'l Symposium on Molecular Plant-Microbe Interactions (Edinburgh, Scotland) (1994) (enzymatic inactivation in transgenic tobacco via production of single-chain antibody fragments).

P. A virus-specific antibody. See, for example, Tavladoraki et al., Nature 366:469 (1993), who show that transgenic plants expressing recombinant antibody genes are protected from virus attack.

Q. A developmental-arrestive protein produced in nature by a pathogen or a parasite. Thus, fungal endo α-1, 4-D-polygalacturonases facilitate fungal colonization and plant nutrient release by solubilizing plant cell wall homo-α-1,4-D-galacturonase. See Lamb et al., Bio/Technology 10:1436 (1992). The cloning and characterization of a gene which encodes a celery endopolygalacturonase-inhibiting protein is described by Toubart et al., Plant J. 2:367 (1992).

R. A developmental-arrestive protein produced in nature by a plant. For example, Logemann et al., Bio/Technology 10:305 (1992), have shown that transgenic plants expressing the barley ribosome-inactivating gene have an increased resistance to fungal disease.

S. A lettuce mosaic potyvirus (LMV) coat protein gene introduced into celery in order to increase its resistance to LMV infection. See Dinant et al., Molecular Breeding. 1997, 3: 1, 75-86.

T. Genes involved in the Systemic Acquired Resistance (SAR) Response and/or the pathogenesis-related genes. Briggs, S., Current Biology, 5(2) (1995).

U. Antifungal genes. See Cornelissen and Melchers, Plant Physiol., 101:709-712 (1993); Parijs et al., Planta 183:258-264 (1991) and Bushnell et al., Can. J. of Plant Path. 20(2):137-149 (1998).

V. Genes that confer resistance to Phytophthora root rot, such as the Rps 1, Rps 1-a, Rps 1-b, Rps 1-c, Rps 1-d, Rps 1-e, Rps 1-k, Rps 2, Rps 3-a, Rps 3-b, Rps 3-c, Rps 4, Rps 5, Rps 6, Rps 7 and other Rps genes. See, for example, Shoemaker et al., Phytophthora Root Rot Resistance Gene Mapping in Soybean, Plant Genome IV Conference, San Diego, Calif. (1995).

2. Genes That Confer Resistance to an Herbicide:

A. An herbicide that inhibits the growing point or meristem, such as an imidazolinone or a sulfonylurea. Exemplary genes in this category code for mutant ALS and AHAS enzyme as described, for example, by Lee et al., EMBO J. 7:1241 (1988), and Miki et al., Theor. Appl. Genet. 80:449 (1990), respectively.

B. Glyphosate (resistance impaired by mutant 5-enolpyruvlshikimate-3-phosphate synthase (EPSPS) and aroA genes, respectively) and other phosphono compounds such as glufosinate (phosphinothricin acetyl transferase, PAT and Streptomyces hygroscopicus phosphinothricin-acetyl transferase, bar, genes), and pyridinoxy or phenoxy proprionic acids and cyclohexones (ACCase inhibitor-encoding genes). See, for example, U.S. Pat. No. 4,940,835 to Shah, et al., which discloses the nucleotide sequence of a form of EPSPs which can confer glyphosate resistance. A DNA molecule encoding a mutant aroA gene can be obtained under ATCC accession number 39256, and the nucleotide sequence of the mutant gene is disclosed in U.S. Pat. No. 4,769,061 to Comai. See also Umaballava-Mobapathie in Transgenic Research. 1999, 8: 1, 33-44 that discloses Lactuca sativa resistant to glufosinate. European patent application No. 0 333 033 to Kumada et al., and U.S. Pat. No. 4,975,374 to Goodman et al., disclose nucleotide sequences of glutamine synthetase genes which confer resistance to herbicides such as L-phosphinothricin. The nucleotide sequence of a phosphinothricin-acetyltransferase gene is provided in European application No. 0 242 246 to Leemans et al., DeGreef et al., Bio/Technology 7:61 (1989), describe the production of transgenic plants that express chimeric bar genes coding for phosphinothricin acetyl transferase activity. Exemplary of genes conferring resistance to phenoxy proprionic acids and cyclohexones, such as sethoxydim and haloxyfop are the Acc1-S1, Acc1-S2 and Acc1-S3 genes described by Marshall et al., Theor. Appl. Genet. 83:435 (1992).

C. An herbicide that inhibits photosynthesis, such as a triazine (psbA and gs+ genes) and a benzonitrile (nitrilase gene). Przibilla et al., Plant Cell 3:169 (1991), describe the transformation of Chlamydomonas with plasmids encoding mutant psbA genes. Nucleotide sequences for nitrilase genes are disclosed in U.S. Pat. No. 4,810,648 to Stalker, and DNA molecules containing these genes are available under ATCC Accession Nos. 53435, 67441, and 67442. Cloning and expression of DNA coding for a glutathione S-transferase is described by Hayes et al., Biochem. J. 285:173 (1992).

D. Acetohydroxy acid synthase, which has been found to make plants that express this enzyme resistant to multiple types of herbicides, has been introduced into a variety of plants. See Hattori et al., Mol. Gen. Genet. 246:419, 1995. Other genes that confer tolerance to herbicides include a gene encoding a chimeric protein of rat cytochrome P4507A1 and yeast NADPH-cytochrome P450 oxidoreductase (Shiota et al., Plant Physiol., 106:17, 1994), genes for glutathione reductase and superoxide dismutase (Aono et al., Plant Cell Physiol. 36:1687, 1995), and genes for various phosphotransferases (Datta et al., Plant Mol. Biol. 20:619, 1992).

E. Protoporphyrinogen oxidase (PPO; protox) is the target of the PPO-inhibitor class of herbicides; a PPO-inhibitor resistant PPO gene was recently identified in Amaranthus tuberculatus (Patzoldt et al., PNAS, 103(33):12329-2334, 2006). PPO is necessary for the production of chlorophyll, which is necessary for all plant survival. The protox enzyme serves as the target for a variety of herbicidal compounds. These herbicides also inhibit growth of all the different species of plants present, causing their total destruction. The development of plants containing altered protox activity which are resistant to these herbicides are described in U.S. Pat. Nos. 6,288,306, 6,282,837, 5,767,373, and International Publication WO 01/12825.

F. Genes that confer resistance to auxin or synthetic auxin herbicides. For example an aryloxyalkanoate dioxygenase (AAD) gene may confer resistance to arlyoxyalkanoate herbicides, such as 2,4-D, as well as pyridyloxyacetate herbicides, such as described in U.S. Pat. No. 8,283,522, and US2013/0035233. In other examples, a dicamba monooxygenase (DMO) is used to confer resistance to dicamba. Other polynucleotides of interest related to auxin herbicides and/or uses thereof include, for example, the descriptions found in U.S. Pat. Nos. 8,119,380; 7,812,224; 7,884,262; 7,855,326; 7,939,721; 7,105,724; 7,022,896; 8,207,092; US2011/067134; and US2010/0279866. Any of the above listed herbicide genes (1-6) can be introduced into the claimed celery cultivar through a variety of means including, but not limited to, transformation and crossing.

3. Genes that Confer or Contribute to a Value-Added Trait, Such as:

A. Increased iron content of the celery, for example by transforming a plant with a soybean ferritin gene as described in Goto et al., Acta Horticulturae. 2000, 521, 101-109.

B. Decreased nitrate content of leaves, for example by transforming a celery with a gene coding for a nitrate reductase. See for example Curtis et al., Plant Cell Report. 1999, 18:11, 889-896.

C. Increased sweetness of the celery by transferring a gene coding for monellin that elicits a flavor 100,000 times sweeter than sugar on a molar basis. See Penarrubia et al., Biotechnology. 1992, 10:5, 561-564.

D. Modified fatty acid metabolism, for example, by transforming a plant with an antisense gene of stearyl-ACP desaturase to increase stearic acid content of the plant. See Knultzon et al., Proc. Natl. Acad. Sci. USA 89:2625 (1992).

E. Modified carbohydrate composition effected, for example, by transforming plants with a gene coding for an enzyme that alters the branching pattern of starch. See Shiroza et al., J. Bacteriol. 170:810 (1988) (nucleotide sequence of Streptococcus mutants fructosyltransferase gene), Steinmetz et al., Mol. Gen. Genet. 20:220 (1985) (nucleotide sequence of Bacillus subtilis levansucrase gene), Pen et al., Bio/Technology 10:292 (1992) (production of transgenic plants that express Bacillus lichenifonnis α-amylase), Elliot et al., Plant Molec. Biol. 21:515 (1993) (nucleotide sequences of tomato invertase genes), Søgaard et al., J. Biol. Chem. 268:22480 (1993) (site-directed mutagenesis of barley α-amylase gene), and Fisher et al., Plant Physiol. 102:1045 (1993) (maize endosperm starch branching enzyme II).

F. Altered antioxidant content or composition, such as alteration of tocopherol or tocotrienols. See, for example, U.S. Pat. Nos. 6,787,683, 7,154,029, WO 00/68393 (involving the manipulation of antioxidant levels through alteration of a phytl prenyl transferase (ppt)); WO 03/082899 (through alteration of a homogentisate geranyl geranyl transferase (hggt)).

G. Modified bolting tolerance in plants for example, by transferring a gene encoding for gibberellin 2-oxidase (U.S. Pat. No. 7,262,340). Bolting has also been modified using non-transformation methods; see Wittwer, S. H., et al. (1957) Science. 126(3262): 30-31; Booij, R. et al., (1995) Scientia Horticulturae. 63:143-154; and Booij, R. et al., (1994) Scientia Horticulturae. 58:271-282.

H. Decreased browning of the celery, for example by transforming a plant with an siRNA, RNAi or microRNA vector, or other suppression sequence coding for polyphenol oxidase (PPO) to silence the expression of PPO genes. See Araji et al. (2014) Plant Physiology 164:1191-1203, Chi et al. (2014) BMC Plant Biology 14:62, and Carter, N., (2012) Petition for Determination of Nonregulated Status: Arctic™ Apple (Malta×domestica) Events GD743 and GS784, received by APHIS.

4. Genes that Control Male-Sterility

A. Introduction of a deacetylase gene under the control of a tapetum-specific promoter and with the application of the chemical N-Ac-PPT. See international publication WO 01/29237.

B. Introduction of various stamen-specific promoters. See international publications WO 92/13956 and WO 92/13957.

C. Introduction of the barnase and the barstar genes. See Paul et al., Plant Mol. Biol. 19:611-622, 1992).

For additional examples of nuclear male and female sterility systems and genes, see also, U.S. Pat. Nos. 5,859,341, 6,297,426, 5,478,369, 5,824,524, 5,850,014, and 6,265,640, all of which are hereby incorporated by reference.

5. Genes that Affect Abiotic Stress Resistance

Genes that affect abiotic stress resistance (including but not limited to flowering, seed development, enhancement of nitrogen utilization efficiency, altered nitrogen responsiveness, drought resistance or tolerance, cold resistance or tolerance, high or low light intensity, and salt resistance or tolerance) and increased yield under stress. For example, see: WO 00/73475 where water use efficiency is altered through alteration of malate; U.S. Pat. Nos. 5,892,009, 5,965,705, 5,929,305, 5,891,859, 6,417,428, 6,664,446, 6,706,866, 6,717,034, 6,801,104, WO 2000/060089, WO 2001/026459, WO 2001/035725, WO 2001/034726, WO 2001/035727, WO 2001/036444, WO 2001/036597, WO 2001/036598, WO 2002/015675, WO 2002/017430, WO 2002/077185, WO 2002/079403, WO 2003/013227, WO 2003/013228, WO 2003/014327, WO 2004/031349, WO 2004/076638, WO 98/09521, and WO 99/38977 describing genes, including CBF genes and transcription factors effective in mitigating the negative effects of freezing, high salinity, and drought on plants, as well as conferring other positive effects on plant phenotype; U.S. Publ. No. 2004/0148654 and WO 01/36596, where abscisic acid is altered in plants resulting in improved plant phenotype, such as increased yield and/or increased tolerance to abiotic stress; WO 2000/006341, WO 04/090143, U.S. Pat. Nos. 7,531,723 and 6,992,237, where cytokinin expression is modified resulting in plants with increased stress tolerance, such as drought tolerance, and/or increased yield. See also, WO 02/02776, WO 2003/052063, JP 2002281975, U.S. Pat. No. 6,084,153, WO 01/64898, and U.S. Pat. Nos. 6,177,275 and 6,107,547 (enhancement of nitrogen utilization and altered nitrogen responsiveness). For ethylene alteration, see, U.S. Publ. Nos. 2004/0128719, 2003/0166197, and WO 2000/32761. For plant transcription factors or transcriptional regulators of abiotic stress, see, e.g., U.S. Publ. Nos. 2004/0098764 or 2004/0078852.

Other genes and transcription factors that affect plant growth and agronomic traits, such as yield, flowering, plant growth, and/or plant structure, can be introduced or introgressed into plants. See, e.g., WO 97/49811 (LHY), WO 98/56918 (ESD4), WO 97/10339, U.S. Pat. No. 6,573,430 (TFL), 6,713,663 (FT), 6,794,560, 6,307,126 (GAI), WO 96/14414 (CON), WO 96/38560, WO 01/21822 (VRN1), WO 00/44918 (VRN2), WO 99/49064 (GI), WO 00/46358 (FM), WO 97/29123, WO 99/09174 (D8 and Rht), WO 2004/076638, and WO 004/031349 (transcription factors).

Tissue Culture

Further reproduction of the variety can occur by tissue culture and regeneration. Tissue culture of various tissues of celery and regeneration of plants there from is well known and widely published. For example, reference may be had to Teng et al., HortScience. 1992, 27: 9, 1030-1032 Teng et al., HortScience. 1993, 28: 6, 669-1671, Zhang et al., Journal of Genetics and Breeding. 1992, 46: 3, 287-290, Webb et al., Plant Cell Tissue and Organ Culture. 1994, 38: 1, 77-79, Curtis et al., Journal of Experimental Botany. 1994, 45: 279, 1441-1449, Nagata et al., Journal for the American Society for Horticultural Science. 2000, 125: 6, 669-672, and Ibrahim et al., Plant Cell, Tissue and Organ Culture. (1992), 28(2): 139-145. It is clear from the literature that the state of the art is such that these methods of obtaining plants are routinely used and have a very high rate of success. Thus, another aspect of this invention is to provide cells which upon growth and differentiation produce celery plants having the physiological and morphological characteristics of variety TBG 28.

As used herein, the term “tissue culture” indicates a composition comprising isolated cells of the same or a different type or a collection of such cells organized into parts of a plant. Exemplary types of tissue cultures are protoplasts, calli, plant clumps, and plant cells that can generate tissue culture that are intact in plants or parts of plants, such as embryos, hypocotyls, pollen, flowers, seeds, leaves, stems, roots, root tips, pistils, anthers, meristematic cells and the like. Means for preparing and maintaining plant tissue culture are well known in the art. By way of example, a tissue culture comprising organs has been used to produce regenerated plants. U.S. Pat. Nos. 5,959,185; 5,973,234 and 5,977,445 describe certain techniques, the disclosures of which are incorporated herein by reference.

Industrial Uses of Celery Cultivar TBG 28

Celery may be used in a variety of manners including but not limited to, use in salads, soups, being filled with cheese, soybean, vegetable, peanut butter, or dairy type products, served raw, cooked, baked or frozen, served as sticks, pieces, diced, or dipped like potato chips, or used as straws.

Tables

In the tables that follow, the traits and characteristics of celery cultivar TBG 28 are given compared to other celery cultivars. Color references made in the Tables refer to the Munsell Color Chart.

Table 2 shows the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 37, ADS-22 (U.S. Pat. No. 8,598,424), ADS-1 (U.S. Pat. No. 6,822,143), Dutchess, and Green Bay. The trial was transplanted in Byron Center, Michigan on May 29, 2017, and evaluated on Aug. 17, 2017 (80 days). This trial was grown in a normal production block on muck soil that had typical production disease and environmental stress. The plant population was 56,000 plants to the acre. Table 2, column 1 shows the characteristic and columns 2-7 show the results for TBG 28, TBG 37, ADS-22, ADS-1, Dutchess, and Green Bay, respectively.

TABLE 2 TBG 28 TBG 37 ADS 22 ADS-1 Dutchess Green Bay Plant height (cm) Average 92.2 82.6 82.8 76.8 78.3 79.3 Range  (83.3-100.0) (77.5-88.8) (75.0-87.5) (72.5-82.5) (73.8-80.0)   (70-87.5) Whole plant weight (kg) Average 1.29 1.07 1.22 1.18 1.11 1.36 Range (0.94-1.8)  (0.77-1.35)  (0.8-1.61) (0.92-1.64) (0.71-1.35) (0.93-1.68) Trimmed plant weight Average 0.91 0.77 0.95 0.91 0.85 1.02 (kg @ 35.6 cm) Range (0.67-1.21) (0.56-1.03) (0.64-1.24) (0.69-1.3)  (0.56-1.03) (0.67-1.27) Number of outer petioles Average 12.6 9.8 10.8 9.5 10.9 11.6 (>35.6 cm) Range (11-14)  (8-12)  (8-16)  (7-12)  (9-13)  (9-14) Number of inner petioles Average 9.9 6.9 8.0 7.6 6.9 7.6 (<35.6 cm) Range  (8-12) (6-8)  (7-10)  (5-10) (5-9)  (5-10) Length of outer petioles to Average 37.3 31.8 25.0 26.8 29.0 29.8 the joint (cm) Range (32.0-42.8) (26.3-35.3) (22.3-29.8) (24.3-30.0) (26.8-31.5) (25.0-34.8) Width of outer petioles at Average 19.1 18.0 20.2 19.2 17.4 20.0 the midrib (mm) Range (17.0-21.3) (16.7-19.0) (17.7-23.3) (16.7-22.3) (15.7-18.3) (18.3-22.7) Thickness of outer petioles Average 10.4 9.4 10.2 10.9 10.0 12.2 at the midrib (mm) Range  (8.7-11.7)  (7.7-10.7)  (8.3-11.3)  (9.0-12.3)  (9.0-10.7) (10.7-14.0) Seed stem length (cm) Average 0.0 0.0 0.0 0.0 0.2 0.6 Range (0-0) (0-0) (0-0) (0-0) (0-1) (0-1) Median 0.0 0.0 0.0 0.0 0.0 1.0 Petiole smoothness Smooth Smooth Smooth Smooth Slight rib/Rib Slight rib Petiole cup Cup Cup/Deep cup Cup/Deep cup Cup/Deep cup Cup/Deep cup Cup % Marketable 100%  100%  100%  100%  90% 90% Defects: % Node crack 0% 10% 20% 30%  0% 50% % Suckers 0% 10% 40% 20%  0% 10% % Feather leaf 0% 10% 20%  0% 10% 40% % Twist 10%  10%  0%  0% 20% 40%

As shown in Table 2, under these Michigan production conditions celery cultivar TBG 28 was not only the tallest of the varieties in the trial but except for TBG 37 and ADS-22, which were the next tallest, the remainder were similar for shorter height. TBG 28 followed by TBG 37 also had the tallest petioles. Green Bay had the highest yield (trimmed plant weight) with TBG 28, ADS-22, and ADS-1 following, all having similar but slightly lower yield. TBG 28 also had the highest number of outer and total number of petioles compared to all of the varieties. The petioles of TBG 28 were slightly narrower and thinner compared to Green Bay but were smoother. ADS-1, ADS-22, TBG 28, and TBG 37 were all 100% marketable compared to Dutchess and Green Bay (90%), which also had slight seed stem elongation in a few plants. TBG 28 was the cleanest variety for defects with only 10% twist, while each of the other varieties had variable levels for node crack, suckers, and feather leaf

Table 3 shows the results of a trial comparing characteristics of celery cultivar TBG 28 to celery variety ADS-1. The trial was transplanted in Byron Center, Michigan on May 16, 2018, and evaluated on Aug. 17, 2018 (93 days). ADS-1 and TBG 28 were grown in a normal production block on muck soil that had no normal production disease and environmental stress. The plant population was 56,000 plants to the acre. Table 3, column 1 shows the characteristic and columns 2-3 show the results for TBG 28 and ADS-1, respectively.

TABLE 3 Plant height (cm) Average 80.2 62.9 Range (75-87) (60-67) Whole plant weight (kg) Average 1.02 0.78 Range (0.8-1.3) (0.65-0.85) Trimmed plant weight Average 0.78 0.67 (kg @ 35.6 cm) Range (0.64-0.94) (0.57-0.73) Number of outer petioles Average 10.6 8.5 (>35.6 cm) Range  (9-13)  (7-10) Number of inner petioles Average 6.4 6.9 (<35.6 cm) Range (4-8) (6-8) Length of outer petioles to Average 33.3 27.1 the joint (cm) Range (31-35) (24.7-30.7) Width of outer petioles at Average 18.1 18.3 the midrib (mm) Range (16.3-19.3) (17.3-20)   Thickness of outer petioles Average 9.8 9.8 at the midrib (mm) Range   (9-10.7)  (9-12) Petiole color (Munsell color) 5gy 7/8 5gy 7/8 Leaf color (Munsell color) 5gy 4/6-4/8 5gy 4/8 Petiole smoothness Smooth Smooth Petiole cup Cup Cup/Deep cup % Marketable 100%  95% Defects: % Node crack 0% 10% % Butt crack 0% 10% % Heart pinch 0% 10%

As shown in Table 3, under these Michigan production conditions celery cultivar TBG 28 was not only taller than ADS-1 but it had improved yield (trimmed plant weight) a greater number of outer petioles and produced a longer petiole. TBG 28 also had a shallower cupped petiole which allowed it to not pinch and occasionally fracture the inner petioles, which caused approximately 5% decrease in yield in ADS-1 which had 10% inner petioles pinching and resulting distortion. TBG 28 was also free from node crack and butt crack.

Table 4 shows the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 31 (U.S. Pat. No. 9,439,374), TBG 54, TBG 32 (U.S. Pat. No. 9,433,162), ADS-23 (U.S. Pat. No. 8,598,425), ADS-8 (U.S. Pat. No. 6,812,385; U.S. PVP Certificate No. 200200021), TBG 35, TBG 37, TBG 29 (U.S. Pat. No. 10,440,913), and TBG 33 (U.S. Pat. No. 9,713,308). The trial was transplanted in Belle Glade, Florida on Oct. 13, 2018, and evaluated on Jan. 22, 2019 (101 days). This trial was grown in a normal and traditional production block that had no particular diseases or environmental stress. The plant population was 39,100 plants to the acre. Represented in the trial of Florida varieties were California varieties TBG 37, TBG 29, and TBG 33, as well as a variety that was developed for use in Michigan, TBG 28. Table 4, column 1 shows the characteristic and columns 2-11 show the results for TBG 28, TBG 31, TBG 54, TBG 32, ADS-23, ADS-8, TBG 35, TBG 37, TBG 29, and TBG 33, respectively.

TABLE 4 TBG 28 TBG 31 TBG 54 TBG 32 ADS-23 Plant height (cm) Average 84.4 77.0 72.1 82.4 88.6 Range (80-89) (75-79) (68-76) (80-85) (84-92) Whole plant Average 0.96 1.37 1.23 1.34 1.42 weight (kg) Range (0.77-1.28) (1.16-1.61) (0.99-1.41) (1.11-1.55) (1.01-1.79) Trimmed plant Average 0.68 1.09 1.01 0.99 1.00 weight Range (0.55-0.88) (0.91-1.3)  (0.82-1.16) (0.84-1.16)  (0.7-1.27) (kg @ 35.6 cm) Number of outer Average 11.9 12.6 13.3 11.9 11.7 petioles Range (10-15) (11-14) (11-15) (10-13) (10-14) (>35.6 cm) Number of inner Average 5.2 5.5 6.5 5.5 6.5 petioles Range (4-7) (3-7) (5-8) (4-7) (5-8) (<35.6 cm) Length of outer Average 32.5 33.1 29.5 35.8 33.8 petioles to the Range (30.3-35.7) (31.7-34.7) (27.3-31.7) (32.7-37.7) (31.3-36.7) joint (cm) Width of outer Average 18.6 21.6 20.9 22.2 22.0 petioles at the Range (16.3-20)   (19.7-23.7) (19-23) (20.7-24)   (18.3-23.3) midrib (mm) Thickness of Average 9.4 11.0 11.1 11.4 10.7 outer petioles at Range (8.3-11)  (10-12) (10.3-12.7) (10.7-12.7)  (9.3-11.3) the midrib (mm) % Marketable 100%  100%  100%  100%  100%  Defects: % Node crack 0% 70% 40%  40% 0% % Feather leaf 0% 10% 0% 40% 0% % Blackheart 0%  0% 0%  0% 0% ADS-8 TBG 35 TBG 37 TBG 29 TBG 33 Plant height (cm) Average 70.5 73.3 82.9 72.8 79.0 Range (66-74) (70-77) (79-87) (66-79) (73-82) Whole plant Average 1.30 1.35 1.20 0.80 0.88 weight (kg) Range (0.95-1.65) (1.11-1.52) (1.03-1.39) (0.65-0.93) (0.56-1.07) Trimmed plant Average 1.06 1.07 0.89 0.66 0.65 weight Range  (0.8-1.36) (0.89-1.22) (0.77-1.05) (0.55-0.76) (0.42-0.82) (kg @ 35.6 cm) Number of outer Average 11.4 11.4 12.9 9.6 9.4 petioles Range (10-14) (10-13) (12-14)  (7-12)  (7-11) (>35.6 cm) Number of inner Average 6.7 7.1 6.2 6.3 4.6 petioles Range (6-8) (5-8) (5-7) (5-9) (3-6) (<35.6 cm) Length of outer Average 25.5 28.1 34.2 25.1 32.0 petioles to the Range   (19-29.3)   (23-30.7) (31.3-37.3) (21.3-27)   (28.3-36)   joint (cm) Width of outer Average 23.0 2.1 20.3 19.2 19.6 petioles at the Range   (20-24.7) (19.7-24)   (18.3-22.3) (16.7-21)   (17.3-21.3) midrib (mm) Thickness of Average 11.6 11.2 9.9 9.4 9.0 outer petioles at Range (10.3-13.3) (10.7-12.3) (8.7-11)    (8-10.3) (8.3-9.7) the midrib (mm) % Marketable 100% 100%  100% 0% 90% Defects: % Node crack 100% 60%  40% 0% 70% % Feather leaf  60% 20% 100% 0%  0% % Blackheart  0%  0%  0% 100%   0%

As shown in Table 4, under these conditions ADS-23 is the tallest (plant height) of the varieties followed by TBG 28 and TBG 32 and TBG 37 which were similar. ADS-8 was the shortest of the varieties. In contrast, trimmed weight (market weight) was highest for TBG-31, TBG 35, ADS-8, TBG 54, followed by ADS-23. The lowest trimmed weight was for the California varieties and TBG 28. TBG 35 was taller than its predecessor ADS-8 but had very similar trimmed weight and number of outer petioles but was considerably improved for more desirable longer outer petioles. TBG 35 also had less defects (node cracks and feather leaf). While TBG 54 was shorter and had slightly lower trimmed weight and more outer petioles which were slightly shorter, it was considerably improved for defects (node crack and feather leaf). Celery cultivar TBG 28 was taller and while having lower trimmed weight had an advantage over all of the varieties except ADS-23 due to decreased defects.

Table 5 shows the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 31, TBG 54, TBG 32, ADS-23, ADS-8, TBG 35, Floribelle, TBG 37, TBG 29, and TBG 33. The trial was transplanted in Belle Glade, Florida on Nov. 29, 2018, and evaluated on Mar. 8, 2019 (99 days). This trial was grown in a normal and traditional production block that had no particular diseases or environmental stress. The plant population was 39,100 plants to the acre. Table 5, column 1 shows the characteristic and columns 2-12 show the results for TBG 28, TBG 31, TBG 54, TBG 32, ADS-23, ADS-8, TBG 35, Floribelle, TBG 37, TBG 29, and TBG 33, respectively.

TABLE 5 TBG 28 TBG 31 TBG 54 TBG 32 ADS-23 ADS-8 Plant height Average 79.2 70.5 73.7 74.3 84.3 70.1 (cm) Range (75-84) (66-73) (72-76) (70-76) (80-88) (68-72) Whole plant Average 0.77 1.12 1.25 1.02 1.00 1.08 weight (kg) Range (0.66-0.89) (0.84-1.43) (0.95-1.52) (0.67-1.26) (0.77-1.32) (0.82-1.3)  Trimmed plant Average 0.60 0.93 1.02 0.81 0.75 0.91 weight Range (0.51-0.68) (0.7-1.2) (0.78-1.26) (0.52-1.05) (0.58-1.01) (0.67-1.09) (kg @ 35.6 cm) Number of Average 13.8 14.7 13.1 15.2 13.1 12.0 outer petioles Range (12-16) (11-17)  (4-16) (10-19) (12-14) (10-14) (>35.6 cm) Number of Average 5.1 6.9 6.7 6.1 6.4 6.6 inner petioles Range (4-6) (6-8) (5-9) (5-8) (5-8) (6-8) (<35.6 cm) Length of outer Average 30.1 30.5 28.9 34.9 31.6 27.2 petioles to the Range   (29-31.7)   (28-32.3) (26-30)   (33-37.7) (28.3-35)   (24.7-30.3) joint (cm) Width of outer Average 18.4 19.4 21.7 19.5 19.2 21.3 petioles at the Range (16.7-21)     (18-21.3) (20.3-23.3) (18.3-20.7) (17.7-23)     (20-22.7) midrib (mm) Thickness of Average 7.9 8.7 10.4 8.7 8.7 10.4 outer petioles Range (6.3-9.7) (7.3-11)   (9.3-11.7) (7.7-9.7)  (8-10) (9.3-11)  at the midrib (mm) % Marketable 0% 100%  100%  100%  100%  100%  Defects: % Node crack 30%  0% 0% 0% 0% 20% % Brown stem 0% 0% 0% 0% 0% 10% % Butt crack 0% 0% 0% 0% 0%  0% % Top pith 100%  0% 0% 10%  90%  20% % Butt pith 100%  0% 0% 0% 50%  10% % Feather leaf 60%  10%  0% 30%  50%  60% % Blackheart 0% 0% 0% 0% 0%  0% % Twist 100%  0% 0% 0% 0%  0% TBG 35 Floribelle TBG 37 TBG 29 TBG 33 Plant height Average 71.5 69.60 73.9 72.3 71.2 (cm) Range (69-73) (65-75) (68-80) (68-79) (67-77) Whole plant Average 1.11 0.89 0.80 0.93 0.79 weight (kg) Range (0.89-1.37) (0.64-1.29) (0.64-1.04) (0.61-1.26) (0.46-0.96) Trimmed plant Average 0.93 0.74 0.62 0.75 0.63 weight Range (0.77-1.19) (0.53-1.07)  (0.5-0.85)  (0.5-1.01) (0.37-0.76) (kg @ 35.6 cm) Number of Average 13.9 12.4 11.9 12.5 11.0 outer petioles Range (11-17) (10-15) (10-14)  (9-16)  (9-12) (>35.6 cm) Number of Average 7.1 6.2 5.5 6.6 5.0 inner petioles Range (6-9)  (4-16) (4-7) (4-9) (3-6) (<35.6 cm) Length of outer Average 28.5 28.0 28.4 25.7 26.4 petioles to the Range (26.7-29.7) (26-32) (26-31) (22.3-29.7)   (24-29.3) joint (cm) Width of outer Average 20.5 18.8 17.4 19.5 18.1 petioles at the Range (18.7-22.3) (15.7-22.7) (14.3-21.3) (17-22) (15.3-20.7) midrib (mm) Thickness of Average 10.0 8.3 7.8 9.1 7.7 outer petioles Range  (9.3-11.3)  (6.7-10.3) (7-9)  (6.3-10.3) (5.7-8.7) at the midrib (mm) % Marketable 100%   0% 10%   0% 20%  Defects: % Node crack 0% 10% 0% 10% 20%  % Brown stem 0% 10% 0%  0% 0% % Butt crack 0% 10% 0%  0% 0% % Top pith 10%  60% 90%  90% 80%  % Butt pith 0% 70% 90%  100%  80%  % Feather leaf 30%  100%  0% 80% 0% % Blackheart 0%  0% 0% 20% 0% % Twist 0% 70% 0%  0% 0%

As shown in Table 5, under these conditions Floribelle and ADS-8 were the shortest for overall plant height, and except for ADS-23 and TBG 28 which were the tallest, the remaining varieties were fairly similar. TBG 35 was an improvement over ADS-8 for height, number and length of outer petioles and had considerably less defects. Similarly, TBG 54 outperformed TBG 31 for height and yield (trimmed plant weight), and while it had fewer outer petioles, they were wider and thicker. Both varieties were fairly free from defects. The California varieties planted in the trial (TBG 37, TBG 33, TBG 29) and TBG 28 were generally the lowest yielding (trimmed plant weight), had poorest marketability, and had significant issues with defects, in particular pith.

Tables 6A and 6B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 31, TBG 54, TBG 32, TBG 53, TBG 23, ADS-8, TBG 35, Floribelle, TBG 37, ADS-1, TBG 29, and TBG 33. The trial was transplanted in Belle Glade, Florida on Oct. 24, 2019, and evaluated on Jan. 31, 2020 (99 days). Both Eastern varieties developed for Florida (TBG 31, TBG 32, TBG 35, Floribelle, ADS-8, and ADS-23) and Michigan (TBG 28) production in muck soil and Western varieties, developed for California and Arizona production on mineral soil (TBG 29, TBG 33, TBG 37, and ADS-1) where grown in a normal production block on muck soil that had no particular diseases or environmental stress. The plant population (39,100 plants to the acre). Table 6A, column 1 shows the characteristic and columns 2-8 show the results for TBG 28, TBG 31, TBG 54, TBG 32, TBG 53, TBG 23, and ADS-8, respectively. Table 6B, column 1 shows the characteristic and columns 2-7 show the results for TBG 35, Floribelle, TBG 37, ADS-1, TBG 29, and TBG 33, respectively.

TABLE 6A TBG 28 TBG 31 TBG 54 TBG 32 TBG 53 TBG 23 ADS-8 Plant height (cm) Average 83.10 73.40 75.80 78.10 73.30 85.50 74.80 Range (80-87) (70-77) (74-78) (76-81) (69-79) (82-89) (69-80) Whole plant weight (kg) Average 1.26 1.13 1.23 1.21 1.23 1.17 1.01 Range (0.99-1.58) (0.86-1.31) (1.09-1.51) (0.88-1.53) (1.03-1.49) (1.03-1.46)  (0.8-1.22) Trimmed plant weight Average 0.95 0.90 0.98 0.94 1.00 0.85 0.83 (kg @ 35.6 cm) Range (0.73-1.2)  (0.71-1.07) (0.84-1.27) (0.68-1.21) (0.81-1.22) (0.73-1.04) (0.69-1)   Number of outer petioles Average 13.7 13.3 12.7 12.9 14.6 12.1 11.0 (>35.6 cm) Range (10-17) (10-17) (11-16)  (9-15) (13-17) (10-13) (10-13) Number of inner petioles Average 3.5 4.6 4.2 3.9 5.1 4.8 3.9 (<35.6 cm) Range (2-5) (3-5) (3-5) (2-6) (3-6) (4-6) (3-5) Length of outer petioles Average 32.3 32.1 32.9 34.2 34.6 34.7 29.0 to the joint (cm) Range (30-36)   (29-36.3) (31.3-35)     (31-36.3) (32.7-36.7) (30.7-37.7) (26.7-32)   Width of outer petioles Average 21.6 21.8 22.3 21.8 21.3 21.0 20.5 at the midrib (mm) Range (20.3-24)   (20.3-23.3) (20.3-24)   (19.7-23.7) (19.3-23.7) (19.7-22.3)   (19-22.3) Thickness of outer petioles Average 9.9 8.9 9.6 9.8 9.3 9.4 9.2 at the midrib (mm) Range  (9.3-10.7)  (8-10)  (8.7-10.3)  (8.3-10.7) (8.3-10)   (8.3-10.3)  (7.7-10.3) Petiole color (Munsell color) 5gy 7/6-5gy 6/6 5gy 5/10 5gy 6/8 5gy 6/8 5gy 6/10 5gy 7/6 5gy 6/6 Leaf color (Munsell color) 5gy 4/4 5gy 4/8 5gy 4/8 5gy 4/8 5gy 5/6 5gy 5/6 5gy 4/4 Petiole smoothness Smooth Smooth/ Smooth/ Smooth/ Smooth/ Smooth Smooth/ Slight rib Slight rib Slight rib Slight rib Slight rib Petiole cup Cup Cup/Deep Cup/Deep Slight Cup/Deep Cup/Deep Cup/Deep cup cup cup/Cup cup cup cup % Marketable 100%  100%  100%  100%  100%  100%  70% Defects: % Node crack 0% 10% 10% 0% 10%   0% 40% % Brown stem 0%  0%  0% 0% 0% 10%  0% % Top pith 0% 10%  0% 0% 0%  0% 20% % Butt pith 0% 30% 20% 0% 0% 10%  0% % Feather leaf 0% 30% 30% 40%  40%  40% 30% % Twist 0% 10% 40% 10%  0% 60%  0%

TABLE 6B TBG 35 Floribelle TBG 37 ADS-1 TBG 29 TBG 33 Plant height (cm) Average 75.90 70.80 83.60 82.00 77.60 79.80 Range (72-79) (65-76) (80-86) (76-86) (75-81) (69-87) Whole plant weight (kg) Average 1.34 1.08 1.05 1.00 0.94 0.95 Range (0.88-1.84) (0.83-1.32) (0.75-1.37) (0.73-1.22) (0.62-1.2)  (0.54-1.36) Trimmed plant weight Average 1.09 0.86 0.79 0.77 0.74 0.71 (kg @ 35.6 cm) Range (0.7-1.5) (0.67-1.03) (0.56-1.03) (0.57-0.93) (0.48-0.96)  (0.4-1.03) Number of outer petioles Average 13.2 12.3 11.4 10.6 11.3 11.3 (>35.6 cm) Range  (8-17)  (9-15)  (9-14)  (9-12) (10-15)  (8-13) Number of inner petioles Average 4.0 3.4 3.6 3.6 3.3 3.1 (<35.6 cm) Range (3-5) (2-4) (3-4) (2-5) (2-4) (2-4) Length of outer petioles Average 31.4 28.9 32.6 28.8 20.7 30.5 to the joint (cm) Range (27.7-36)   (25.7-32.7) (28.7-35.7)   (27-30.3) (17.3-23.3) (26.7-35)   Width of outer petioles Average 20.8 20.7 20.2 19.8 20.7 19.0 at the midrib (mm) Range (19-25) (18.7-23)   (18.3-22.3)   (18-21.7) (17.3-23.3) (15.7-21)   Thickness of outer Average 9.6 9.4 8.9 9.0 9.2 8.5 petioles at the midrib Range  (8.7-10.7)  (8.3-10.3)  (8-10) (8.3-10)  (6.3-10)    (7-10.3) (mm) Petiole color (Munsell color) 5GY 6/8 5GY 7/6 5GY 6/6 5GY 7/6 5GY 7/6 5GY 7/6- 5GY6/6 Leaf color (Munsell color) 5GY 5/4 5GY 4/6 5GY 3/4 5GY 3/4 5GY 4/4 5GY 4/4 Petiole smoothness Slight rib Rib Smooth Smooth/ Smooth Slight rib Slight rib Petiole cup Cup Cup Cup Deep cup Cup Cup/Deep cup % Marketable 100%  0% 100%  60% 40% 50% Defects: % Node crack 10% 0% 0% 10%  0% 20% % Brown stem  0% 40%  0%  0%  0%  0% % Top pith  0% 100%  0%  0% 10% 30% % Butt pith 10% 100%  10%  50% 40% 30% % Feather leaf 80% 100%  10%  30% 60% 20% % Twist 30% 0% 0% 40%  0%  0%

As shown in Tables 6A and 6B, under these conditions, except for ADS-23 and TBG 29, the California and Michigan varieties produced the tallest stalks. However, the California varieties (ADS-1, TBG 29, TBG 33, and TBG 37) were also the lowest yielding (trimmed plant weight), had the lowest outer petiole count, and except for TBG 37 had very low percentage of marketable stalks. Of the Florida varieties, TBG 54 was a definite improvement over its sister TBG 31 for trimmed weight, length of outer petioles, and plant height. TBG 53 similarly out yielded its parent TBG 32 for trimmed weight and number of outer petioles. While it had outer petiole length similar to TBG 32, TBG 53 was shorter for overall height indicating that it had less foliage. Under these conditions, TBG 53 was also fairly similar to TBG 54 for trimmed weight; however, it possessed higher petiole count (inner and outer) and had longer petioles as measured to the joint. Under these conditions, both TBG 53 and TBG 54 were out yielded by TBG 35 based on trimmed plant weight. TBG 35 was also a significant improvement over its progenitor ADS-8 which had lower yield, shorter height and length to the joint, and lower marketability. TBG 35 was also significantly improved over ADS-8 for propensity for node cracks but was faster maturing and showing signs of increased feather leaf, though not at a level which caused loss of market grade. TBG 53 and TBG 32 were very similar for defects as were TBG 54 and TBG 31 and none were sufficient to cause loss of market grade or marketability. The only variety free from defects was celery cultivar TBG 28 which was developed for Michigan and summer production in muck soil. TBG 28 was not only one of the tallest varieties (stalk height) but it was also had smoother petioles than the Florida varieties and yield fairly similar (trimmed weight) to TBG 54 and TBG 32.

Tables 7A and 7B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-22, ADS-20, Challenger, Sonora (U.S. PVP Certificate No. 009900063), Conquistador, Command (U.S. Pat. No. 7,193,142; U.S. PVP Certificate No. 200400326), Mission, Tall Utah 52-70 ‘It’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Mar. 15, 2017, and evaluated on Jul. 4, 2017 (111 days). This trial was grown in a production block that has been developed with especially high levels of Fusarium oxysporum race 2 for purpose of evaluating and developing varieties for increased tolerance to fusarium. This particular trial also had very slight bolting pressure, with bolting being observed in the susceptible check Tall Utah 52-70 ‘R’ Strain. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Varieties that had 10% or fewer plants marketable had limited data presented here (NA=Not Available). The plant population (39,100 plants to the acre). Table 7A, column 1 shows the characteristic and columns 2-9 show the results for TBG 28, TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, and ADS-22, respectively. Table 7B, column 1 shows the characteristic and columns 2-9 show the results for ADS-20, Challenger, Sonora, Conquistador, Command, Mission, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively.

TABLE 7A TBG 28 TBG 43 TBG 29 ADS-1 TBG 34 TBG 37 TBG 33 ADS-22 Plant height (cm) Average 77.6 83.5 75.7 58.1 69.9 83.3 65.4 81.0 Range (65-83) (78-86) (74-78) (50-62) (68-73) (80-89) (45-72) (79-86) Whole plant weight (kg) Average 0.95 1.31 1.30 0.64 0.91 1.42 0.91 1.03 Range (0.72-1.18) (1.07-1.56) (1.16-1.47) (0.4-0.9) (0.71-1.01) (1.18-1.75) (0.54-1.39) (0.82-1.2)  Trimmed plant weight Average 0.77 0.99 1.04 0.55 0.70 1.08 0.77 0.78 (kg @ 35.6 cm) Range (0.62-0.99) (0.83-1.14) (0.94-1.12) (0.37-0.74) (0.56-0.81) (0.88-1.32) (0.41-1.12) (0.63-0.91) Number of outer petioles Average 19.2 14.6 15.0 13.5 12.8 16.0 12.4 16.4 (>35.6 cm) Range (18-21) (14-17) (13-18) (11-17) (11-14) (14-18)  (9-14) (15-18) Number of inner petioles Average 5.7 5.6 6.2 5.4 3.9 4.9 4.3 5.0 (<35.6 cm) Range (5-7) (5-8) (5-9) (3-7) (3-5) (4-6) (3-5) (4-6) Length of outer petioles Average 31.5 29.3 27.3 21.4 29.0 34.1 24.1 28.8 to the joint (cm) Range (27.7-34.3) (25.7-31.3)   (26-29.3) (17.7-23.7) (27.7-30.7)   (32-35.7) (19.7-25.3) (25-32) Width of outer petioles Average 21.1 25.2 28.7 19.6 24.9 25.5 24.0 23.8 at the midrib (mm) Range (17-23) (23.3-27.7) (25.7-31.3) (17.3-22.3) (21.3-27.7)   (23-28.3) (17.7-27)   (20.7-26)   Thickness of outer Average 8.3 11.1 11.0 8.8 9.6 10.9 9.7 8.3 petioles at the Range  (7-10) (10-12) (10.3-12)   (7.7-10)   (7.7-10.7)   (10-11.7)   (7-10.7) (6.3-9.3) midrib (mm) Seed stem length (cm) Average 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Range (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) Median 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Petiole smoothness Slight rib Smooth Slight rib Rib Rib Smooth Slight rib Slight rib/Rib Petiole cup Slight cup Cup Slight Slight cup Cup Cup Cup Slight cup cup/Cup % Marketable 100% 100% 100% 20% 100% 100% 90% 100% Disease: Overall fusarium ratings Average 3.5 5 5 2 4.5 5 3 4.5 (1 = susceptible, Range 3-4 5 4.5-5   1-3 3-5 4-5 3-4 4-5 5 = tolerant) Root fusarium ratings Average 3 5 4.5 2.5 3 4 2 4 (1 = susceptible, Range   3-3.5 4.5-5   4-5   2-3.5   3-3.5 3.5-4.5 1-3   4-4.5 5 = tolerant)

TABLE 7B Tall Utah 52-70 Tall Utah ADS-20 Challenger Sonora Conquistador Command Mission ‘R’ Strain 52-75 Plant height (cm) Average 53.5 69.8 50.7 49.9 67.9 48.9 36.0 42.1 Range (52-58) (62-79) (47-54) (42-58) (61-75) (45-54) (0-52) (37-49) Whole plant weight (kg) Average NA NA NA NA 0.98 NA NA NA Range (0.72-1.34) Trimmed plant weight Average NA NA NA NA 0.80 NA NA NA (kg @ 35.6 cm) Range (0.59-1.06) Number of outer petioles Average NA NA NA NA 18.1 NA NA NA (>35.6 cm) Range (15-22) Number of inner petioles Average NA NA NA NA 5.2 NA NA NA (<35.6 cm) Range (4-6) Length of outer petioles to Average 20.8 25.6 18.5 15.8 26.2 17.1 18.9 15.5 the joint (cm) Range (18.3-22)   (22-31) (16.7-21)   (13.7-18)   (22.3-31.3) (13-20) 9.0 (10.3-18.7) Width of outer petioles at Average NA NA NA NA 21.4 NA NA NA the midrib (mm) Range (17.7-24.7) Thickness of outer petioles Average NA NA NA NA 8.8 NA NA NA at the midrib (mm) Range (7.3-10)  Seed stem length (cm) Average 0.0 0.6 0.0 0.0 1.0 0.0 28.2 0.0 Range (0-0) (0-4) (0-0) (0-0) (0-7) (0-0)  (0-90) (0-0) Median 0.0 0.0 0.0 0.0 0.0 0.0 19.0 0.0 Petiole smoothness NA NA NA NA Slight NA NA NA rib/Rib Petiole cup NA NA NA NA Slight NA NA NA cup/Cup % Marketable 0% 10% 0% 0% 50% 0% 0% 0% Disease: Overall fusarium ratings Average 2.5 3.5 1.5 1.5 2.5 1.5 1.5 1.5 (1 = susceptible, 5 = tolerant) Range 2-3 2-4 1-2 1-2 2-3 1.5-2   1-2 1-2 Root fusarium ratings Average 2 3 1.5 1.5 2.5 1.5 1.5 1.5 (1 = susceptible, 5 = tolerant) Range   1-2.5 3-4 1-2 1-2 2-3 1-2 1-2 1-2

As shown in Tables 7A and 7B, under these extreme Fusarium oxysporum race 2 levels the most tolerant variety in the trial was TBG 43 (overall and root rating), followed by TBG 29, TBG 37, and ADS-22. These varieties were also 100% marketable. While having lower tolerance levels, TBG 28 and TBG 34 were also 100% marketable and TBG 33 was 90% marketable. Except for Command which was 50% marketable, ADS-1 which was 20% marketable, and Challenger which was 10% marketable all other varieties had no market capability due to extreme fusarium impact. Challenger, which is generally considered relatively tolerant to fusarium race 2, may have been more significantly impacted by fusarium due to the added stress associated with slight bolting initiation. Tall Utah 52-70 ‘R’ Strain, considered the susceptible check for both fusarium race 2 and bolting was significantly impacted by both.

Tables 8A and 8B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-20, Challenger, Sonora, Conquistador, Mission, Tall Utah 52-70 ‘It’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Aug. 9, 2017, and evaluated on Dec. 2, 2017 (115 days) in a normal production field with low to moderate pressure due to Fusarium oxysporum race 2. Tall Utah 52-70 ‘R’ Strain, considered the susceptible check was significantly impacted by fusarium. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 8A, column 1 shows the characteristic and columns 2-8 show the results for TBG 28, TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, and TBG 33, respectively. Table 8B, column 1 shows the characteristic and columns 2-8 show the results for ADS-20, Challenger, Sonora, Conquistador, Mission, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively.

TABLE 8A TBG 28 TBG 43 TBG 29 ADS-1 TBG 34 TBG 37 TBG 33 Plant height (cm) Average 98.3 94.0 80.9 82.1 84.6 88.5 90.2 Range  (95-101) (90-98) (77-84) (77-86) (80-89) (84-92) (86-97) Whole plant weight (kg) Average 1.38 1.39 1.25 1.08 1.05 1.32 1.32 Range (1.06-1.74) (1.06-1.59) (0.98-1.5)  (0.44-1.45) (0.71-1.38) (0.97-1.54) (1.19-1.58) Trimmed plant weight Average 0.94 0.93 1.01 0.84 0.72 0.90 0.93 (kg @ 35.6 cm) Range (0.72-1.17) (0.74-1.08)  (0.8-1.22) (0.59-1.05) (0.51-0.94) (0.73-1.05) (0.82-1.07) Number of outer petioles Average 18.0 13.2 14.8 13.6 10.8 14.1 13.1 (>35.6 cm) Range (15-21) (12-15) (13-17) (12-16) (10-12) (13-15) (11-15) Number of inner petioles Average 4.4 4.1 5.1 5.6 2.8 4.6 3.4 (<35.6 cm) Range (3-7) (3-5) (5-6) (4-8) (2-4) (4-6) (3-4) Length of outer petioles Average 40.9 33.7 30.6 33.8 36.8 36.3 41.3 to the joint (cm) Range   (37-43.3) (30.7-37.7)   (27-34.3)   (24-38.7)   (34-38.3) (32.7-39.3) (37.7-44)   Width of outer petioles Average 23.0 24.3 23.6 23.5 23.0 23.8 25.1 at the midrib (mm) Range (21.3-25.3) (22-27) (20.3-27.3) (20.3-27.3)   (20-25.7) (21.7-25.3) (23-27) Thickness of outer petioles Average 10.4 11.6 11.1 11.0 10.7 10.3 14.2 at the midrib (mm) Range  (8.3-12.3) (11-12) (10.3-12.7) (10-13) (9.7-12)   (9.3-11.3)   (10-41.7) Petiole color (Munsell color) 5gy 7/7 5gy 6/6 5gy 7/6 5gy 7/6 2.5gy 8/4   5gy 6/6 5gy 6/6 Leaf color (Munsell color) 5gy 4/4 5gy 3/4 5gy 4/4 5gy 4/4 5gy 4/4 5gy 3/4 5gy 3/4 Petiole smoothness Smooth Smooth Smooth/ Smooth Smooth Smooth Smooth Slight rib Petiole cup Slight cup Cup Cup Cup Cup Cup Cup % Marketable 100%  100%  100%  90%   0% 100%  100%  % Survivors 100%  100%  100%  100%  100% 100%  100%  Disease ratings: Overall fusarium ratings Average 5 5 5 4 5 5 5 (1 = susceptible, Range 4-5 5 5 4-5 5 5 5 5 = tolerant) Defects: % Brown stem 0% 0% 0% 0%  10% 0% 0% % Pith 0% 0% 0% 0% 100% 0% 0% % Butt pith 0% 0% 0% 0% 100% 0% 20%  % Feather leaf 20%  0% 100%  0%  0% 0% 0% % Twist 0% 0% 0% 0%  40% 0% 0%

TABLE 8B Tall Utah 52-70 ‘R’ Tall Utah ADS-20 Challenger Sonora Conquistador Mission Strain 52-75 Plant height (cm) Average 78.0 85.2 78.4 81.9 82.7 68.3 77.7 Range (75-81) (77-90) (72-83) (76-86) (78-90) (60-76) (75-82) Whole plant weight (kg) Average 1.11 1.10 1.01 0.99 1.15 0.95 1.00 Range (0.97-1.21) (0.77-1.43) (0.77-1.31) (0.78-1.19) (0.77-1.55) (0.27-1.42)  (0.7-1.33) Trimmed plant weight Average 0.83 0.79 0.77 0.71 0.81 0.22 0.5 (kg @ 35.6 cm) Range (0.71-0.9)  (0.54-1.02) (0.64-0.93) (0.57-0.83) (0.68-1.02)   (0-1.17)   (0-0.93) Number of outer petioles Average 12.5 11.1 13 12.6 14.1 2.90 8.10 (>35.6 cm) Range (10-15)  (7-14) (10-15) (11-15) (10-17)  (0-15)  (0-15) Number of inner petioles Average 3.5 4.3 4.9 4.9 4.8 1.6 2.6 (<35.6 cm) Range (3-5) (3-5) (4-5) (4-7) (3-6) (0-9) (0-5) Length of outer petioles Average 37.1 35.8 35.0 38.6 39.7 26.4 34.0 to the joint (cm) Range (34.3-38.7)   (28-42.3)   (30-39.3) (36.7-44)   (35-46) (17.3-33.3) (29.7-39.7) Width of outer petioles Average 23.8 23.4 17.0 20.7 21.2 5.1 12.9 at the midrib (mm) Range (21.3-27)   (20.7-25.3)   (0-23.7) (19-22) (19.3-24.3)   (0-26.3)   (0-23.3) Thickness of outer petioles Average 11.4 11.3 7.7 10.0 9.7 2.5 6.1 at the midrib (mm) Range (10.3-12.3) (9.7-13)    (0-10.3)   (9-10.7)  (8.7-12.7)   (0-13.3)  (0-11) Petiole color (Munsell color) 5gy 7/6 5gy 6/6 5gy 6/6 5gy 7/6 5gy 7/6 2.5gy 8/4   2.5gy 7/6   Leaf color (Munsell color) 5gy 4/4 5gy 3/4 5gy 4/4 5gy 4/4 5gy 4/4 5gy 4/4 5gy 4/4 Petiole smoothness Smooth Smooth Smooth Smooth Smooth Rib Smooth Petiole cup Cup Cup Cup Cup Cup Slight cup/Cup Cup % Marketable 0% 70%  12% 0%  0%  20%  0% % Survivors 100%  100%  100%  100%  100%  100% 100% Disease ratings: Overall fusarium ratings Average 5 5 3.5 3.5 4 3 4 (1 = susceptible, 5 = tolerant) Range 5 5 2-5 2-5 3-5 2-5 3-5 Defects: % Brown stem 0% 0%  0% 0%  0%  0%  16% % Pith 80%  90%  37% 0% 80% 100% 100% % Butt pith 100%  0% 88% 100%  90% 100% 100% % Feather leaf 0% 10%   0% 0% 40%  90%  67% % Twist 40%  100%  37% 100%   0% 100% 100%

As shown in Tables 8A and 8B, under these production conditions with low to moderate pressure from Fusarium oxysporum race 2, TBG 29, TBG 43, TBG 37, TBG 34, and TBG 28 were all 100% marketable. The remaining varieties while having 100% plant survival were impacted sufficiently and had very low to no marketable stalks; the exceptions being ADS-1 and Challenger which were 90% and 70% marketable, respectively. Of all the varieties, TBG 29 and TBG 43 were the highest yielding (trimmed plant weight). TBG 28 and TBG 43 were the tallest (plant height), TBG 33 and TBG 28 produced the longest petioles, and TBG 43 was most similar to ADS-1 for length of outer petioles. TBG 43, TBG 37, and ADS-1 were the only varieties free from defects.

Tables 9A and 9B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-22, Hill's Special (U.S. PVP Certificate No. 009500019), ADS-20, Challenger, Sonora, Conquistador, Command, Mission, Floribelle, ADS-23, TBG 31, TBG 54, TBG 35, TBG 32, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Aug. 6, 2020, and evaluated on Nov. 5, 2020 (91 days). This trial was grown in a production block that has fairly high levels of Fusarium oxysporum race 2. Under these conditions varieties were evaluated for relative tolerance to the disease. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 9A, column 1 shows the characteristic and columns 2-13 show the results for TBG 28, TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-22, Hill's Special, ADS-20, and Challenger, respectively. Table 9B, column 1 shows the characteristic and columns 2-13 show the results for Sonora, Conquistador, Command, Mission, Floribelle, ADS-23, TBG 31, TBG 54, TBG 35, TBG 32, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively. NA indicates data not available.

TABLE 9A TBG 28 TBG 43 TBG 45 TBG 29 ADS-1 TBG 34 Plant height (cm) Average 73.3 77.7 78.7 71.8 50.0 50.4 Range (57-87) (71-84) (72-84) (67-74) (42-59) (44-54) Whole plant weight (kg) Average 0.38 1.08 1.22 1.07 NA NA Range   (0-1.4) (0.77-1.37) (0.79-1.56) (0.77-1.33) Trimmed plant weight Average 0.29 0.85 0.93 0.92 NA NA (kg @ 35.6 cm) Range   (0-1.03) (0.59-1.04) (0.64-1.14) (0.63-1.1)  Number of outer petioles Average 3.3 11.1 11.7 12.3 NA NA (>35.6 cm) Range  (0-13)  (8-13)  (8-14) (10-14) Number of inner petioles Average 1.8 5.0 4.6 5.5 NA NA (<35.6 cm) Range (0-7) (4-6) (4-6) (5-6) Length of outer petioles Average 27.5 27.3 30.1 25.1 17.6 23.0 to the joint (cm) Range (19-33)   (24-29.3) (28-32) (23.3-28)   (14.3-21)   (18.3-27.7) Width of outer petioles Average 7.1 22.5 22.8 23.3 NA NA at the midrib (mm) Range  (0-25) (19.7-25.3)   (20-24.7) (20.7-25)   Thickness of outer petioles Average 3.8 11.5 10.7 11.1 NA NA at the midrib (mm) Range   (0-13.3)  (9.3-13.3)  (9.3-11.3) (9.7-13)  Petiole color (Munsell color) 5gy 7/6 5gy 7/6 5gy 7/8 5gy 7/4 NA NA Leaf color (Munsell color) 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 NA NA Petiole smoothness Smooth Smooth Slight Slight NA NA Rib/Rib Rib/Rib Petiole cup Cup Cup Cup Cup NA NA % Marketable 30%  100%  100%  100%  0% 0% Disease: Overall fusarium ratings Average 4.5 5 5 5 2.5  2.5 (0 = dead, 5 = tolerant) Range 3-5 5 5 5 2-3 2-3 Defects: % Top pith 0% 0% 0% 0% NA NA % Butt pith 0% 0% 0% 0% NA NA % Butt crack 50%  0% 0% 0% NA NA % Twist 70%  0% 0% 0% NA NA % Black heart 0% 0% 0% 0% NA NA Hill's TBG 37 TBG 33 ADS-22 Special ADS-20 Challenger Plant height (cm) Average 78.1 68.1 72.3 47.6 36.7 77.5 Range (75-82) (64-72) (62-82) (43-54) (28-46) (64-87) Whole plant weight (kg) Average 1.06 0.76 0.81 NA NA 1.08 Range (0.92-1.49) (0.19-1.2)  (0.67-1.07) (0.41-1.61) Trimmed plant weight Average 0.84 0.71 0.69 NA NA 0.89 (kg @ 35.6 cm) Range (0.71-1.11) (0.38-0.99) (0.57-0.9)  (0.63-1.23) Number of outer petioles Average 11.1 11.6 10.2 NA NA 10.5 (>35.6 cm) Range  (9-12)  (9-14)  (9-12)  (8-13) Number of inner petioles Average 5.2 4.4 6.3 NA NA 7.4 (<35.6 cm) Range (4-6) (3-6)  (4-10) (5-9) Length of outer petioles Average 29.7 23.3 21.6 21.3 16.0 29.2 to the joint (cm) Range (26.7-33)   (21-25)   (21-22.3) (17.3-25.3) (13-20) (23.7-34.7) Width of outer petioles Average 21.7 19.7 23.1 NA NA 20.9 at the midrib (mm) Range (19-25) (16.7-21.3)   (21-24.7) (14.7-24.3) Thickness of outer petioles Average 10.9 9.9 9.4 NA NA 10.4 at the midrib (mm) Range (10.3-12)    (8.7-10.7)  (7.7-10.3)   (5-12.7) Petiole color (Munsell color) 5gy 7/6 5gy 7/6 5gy 7/6 NA NA 5gy 7/6 Leaf color (Munsell color) 5gy 3/4 5gy 3/4 5gy 3/4 NA NA 5gy 3/4 Petiole smoothness Smooth Slight Smooth NA NA Smooth Rib/Rib Petiole cup Cup Cup Cup NA NA Cup/Deep Cup % Marketable 100%  70%  100%  0% 0% 70% Disease: Overall fusarium ratings Average 5 4 5 3 2 4 (0 = dead, 5 = tolerant) Range 5 3-5 5 2-3 1-2 3-5 Defects: % Top pith 0% 0% 0% NA NA 10% % Butt pith 0% 0% 0% NA NA 10% % Butt crack 0% 0% 0% NA NA 30% % Twist 0% 0% 0% NA NA 100%  % Black heart 0% 0% 0% NA NA 10%

TABLE 9B Sonora Conquistador Command Mission Floribelle ADS-23 Plant height (cm) Average 21.0 32.1 51.3 32.9 12.3 41.6 Range (0-34) (0-49) (38-60)  (0-45)  (0-37)  (0-60) Whole plant weight (kg) Average NA NA NA NA NA NA Range Trimmed plant weight Average NA NA NA NA NA NA (kg @ 35.6 cm) Range Number of outer petioles Average NA NA NA NA NA NA (>35.6 cm) Range Number of inner petioles Average NA NA NA NA NA NA (<35.6 cm) Range Length of outer petioles Average 7.8 13.1 19.5 14.3 6.1 18.4 to the joint (cm) Rang  (0-13) (0-21)   (11-24.3)   (0-21.7)   (0-18.7)   (0-26.7) Width of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Thickness of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Petiole color (Munsell color) NA NA NA NA NA NA Leaf color (Munsell color) NA NA NA NA NA NA Petiole smoothness NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA % Marketable 0% 0% 0% 0% 0% 0% Disease: Overall fusarium ratings Average 1 1 3 1.5 1 1 (0 = dead, 5 = tolerant) Range 0-2 0-2  2-3 0-2 0-2 0-2 Defects: % Top pith NA NA NA NA NA NA % Butt pith NA NA NA NA NA NA % Butt crack NA NA NA NA NA NA % Twist NA NA NA NA NA NA % Black heart NA NA NA NA NA NA Tall Utah 52-70 ‘R’ Tall Utah TBG 31 TBG 54 TBG 35 TBG 32 Strain 52-75 Plant height (cm) Average 37.6 26.1 23.8 29.9 17.0 24.5 Range (0-56)  (0-45)  (0-34) (0-49)  (0-32) (0-37) Whole plant weight (kg) Average NA NA NA NA NA NA Range Trimmed plant weight Average NA NA NA NA NA NA (kg @ 35.6 cm) Range Number of outer petioles Average NA NA NA NA NA NA (>35.6 cm) Range Number of inner petioles Average NA NA NA NA NA NA (<35.6 cm) Range Length of outer petioles Average 17.0 15.0 9.7 13.5 6.2 8.6 to the joint (cm) Rang (0-26)   (0-27.7)   (0-14.3) (0-23)   (0-12.7) (0-14) Width of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Thickness of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Petiole color (Munsell color) NA NA NA NA NA NA Leaf color (Munsell color) NA NA NA NA NA NA Petiole smoothness NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA % Marketable 0% 0% 0% 0% 0% 0% Disease: Overall fusarium ratings Average 2.5 1 1 2 1 1 (0 = dead, 5 = tolerant) Range 0-3  0-2 0-1 0-3  0-1 0-2  Defects: % Top pith NA NA NA NA NA NA % Butt pith NA NA NA NA NA NA % Butt crack NA NA NA NA NA NA % Twist NA NA NA NA NA NA % Black heart NA NA NA NA NA NA

As shown in Tables 9A and 9B, under the Fusarium oxysporum race 2 conditions present in this trial TBG 43, TBG 45, TBG 29, and TBG 37 showed the best tolerance to Fusarium oxysporum race 2 when overall infection ratings and percent marketability were considered. These were followed by TBG 28 and Challenger which also had other major defects that impacted marketability; some as a result of the fusarium infection. TBG 45 and TBG 29 looked most similar when comparing trim plant, although TBG 45 had more initial untrimmed weight which may have been due to its greater plant height and length to first joint which were more similar to TBG 37. However, TBG 37, TBG 43, and TBG 29 were very similar in slightly lower trimmed weight. TBG 45 and TBG 29 were also more similar for ribbiness.

Tables 10A and 10B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-20, Challenger, Sonora, Conquistador, ADS-23, TBG 31, TBG 54, TBG 32, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Aug. 10, 2017, and evaluated on Dec. 12, 2017 (124 days). This trial was grown in a production block that has been developed with especially high levels of Fusarium oxysporum race 2 and currently has low levels of Fusarium oxysporum race 4 beginning to develop. The purpose of this trial was to evaluate and develop varieties for increased tolerance to fusarium. Unfortunately, the presence of race 4 caused some difficulty in assessing tolerance to one race over the other. Hence, a single rating was taken for overall fusarium impact. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 10A, column 1 shows the characteristic and columns 2-10 show the results for TBG 28, TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-20, and Challenger, respectively. Table 10B, column 1 shows the characteristic and columns 2-9 show the results for Sonora, Conquistador, ADS-23, TBG 31, TBG 54, TBG 32, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively. NA indicates data not available.

TABLE 10A TBG 28 TBG 43 TBG 29 ADS-1 TBG 34 Plant height (cm) Average 12.5 73.3 43.9 6.5 34.9 Range (0-78) (59-84)  (0-57)  (0-34)  (0-60) Whole plant weight (kg) Average 0.10 1.00 0.37 0.05 0.41 Range  (0-.95) (0.49-1.47)   (0-0.78)   (0-0.31)   (0-0.96) Trimmed plant weight Average NA 0.66 NA NA 0.30 (kg @ 35.6 cm) Range   (0-1.14)   (0-0.81) Number of outer petioles Average NA 10.0 NA NA 4.3 (>35.6 cm) Range  (0-17)  (0-10) Number of inner petioles Average NA 3.6 NA NA 2.8 (<35.6 cm) Range (0-6) (0-7) Length of outer petioles Average 12.3 25.8 20.0 2.6 14.8 to the joint (cm) Range (0-35) (14.3-32.3)  (0-25)  (0-15)  (0-29) Width of outer petioles Average NA 15.9 NA NA 11.6 at the midrib (mm) Range   (0-27.3)   (0-25.7) Thickness of outer petioles Average NA 8.3 NA NA 4.7 at the midrib (mm) Range   (0-13.3)  (0-10) Petiole smoothness NA Smooth/ NA NA Slight Slight rib rib/Rib Petiole cup NA Slight NA NA Cup cup/Cup % Marketable 0% 70% 0% 0% 10% Disease: Overall fusarium ratings Average 0 4 2.5 0 3.5 (0 = dead, 5 = tolerant) Range 0-2  1-5 2-3 0-2 3-5 TBG 37 TBG 33 ADS-20 Challenger Plant height (cm) Average 24.0 32.2 28.3 31.3 Range  (0-71)  (0-65)  (0-63)  (0-67) Whole plant weight (kg) Average 0.19 0.27 0.31 0.35 Range   (0-0.66)   (0-0.66)   (0-1.14)   (0-1.06) Trimmed plant weight Average NA NA NA 0.08 (kg @ 35.6 cm) Range   (0-0.8) Number of outer petioles Average NA NA NA 1.2 (>35.6 cm) Range  (0-12) Number of inner petioles Average NA NA NA 0.4 (<35.6 cm) Range (0-4) Length of outer petioles Average 9.6 13.3 12.2 12.7 to the joint (cm) Range  (0-29)   (0-26.7)  (0-28)   (0-33.3) Width of outer petioles Average NA NA NA 2.0 at the midrib (mm) Range   (0-20.3) Thickness of outer petioles Average NA NA NA 1.1 at the midrib (mm) Range   (0-11.3) Petiole smoothness NA NA NA Rib Petiole cup NA NA NA Cup % Marketable 0% 0% 0% 10% Disease: Overall fusarium ratings Average 2 2 1 1 (0 = dead, 5 = tolerant) Range 0-5 0-4 0-2 0-3

TABLE 10B Tall Utah 52-70 ‘R’ Tall Utah Sonora Conquistador ADS-23 TBG 31 TBG 54 TBG 32 Strain 52-75 Plant height (cm) Average 44.7 33.4 0.0 3.5 7.8 40.5 10.2 13.3 Range  (0-64)  (0-68) (0-0) (0-35)  (0-40)  (0-60)  (0-56)  (0-46) Whole plant weight (kg) Average 0.43 0.39 0.00 0.03 0.06 0.27 0.11 0.13 Range   (0-1.01)   (0-1.17) (0-0)   (0-0.27)   (0-0.31)   (0-0.58)   (0-0.73)   (0-0.56) Trimmed plant weight (kg) Average NA NA NA NA NA NA NA NA Range Number of outer petioles Average NA NA NA NA NA NA NA NA (>40 cm) Range Number of inner petioles Average NA NA NA NA NA NA NA NA (<40 cm) Range Length of outer petioles Average 17.4 11.8 0.00 1.5 3.7 17.4 4.2 4.8 to the joint (cm) Range  (0-27)   (0-24.3) (0-0) (0-15)   (0-19.7)  (0-27)   (0-23.7)   (0-16.3) Width of outer petioles Average NA NA NA NA NA NA NA NA at the midrib (mm) Range Thickness of outer petioles Average NA NA NA NA NA NA NA NA at the midrib (mm) Range Petiole smoothness NA NA NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA NA NA % Marketable 0% 0% 0% 0% 0% 0% 0% 0% Disease: Overall fusarium ratings Average 2 1 0 0 1 1.5 0 0 (0 = dead, 5 = tolerant) Range 0-2 0-2 0 0-2 0-2 0-3 0-1 0-1

As shown in Tables 10A and 10B, under the Fusarium oxysporum race 2 and 4 conditions of this trial most varieties had only a few marketable plants and survival rates were actually lower than would be expected for race 2 alone. Most were barely alive and most of the data were not collected for the varieties that did not have marketable stalks (marked as NA=not available). Under these conditions TBG 43 was the most tolerant variety and produced 70% marketable stalks. Other varieties known to have good tolerance to fusarium race 2 (i.e., TBG 29 and Challenger) produced few to no marketable stalks, suggesting that the trial site developed for fusarium race 2 was now severely impacted by fusarium race 4.

Tables 11A and 11B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-22, Hill's Special, ADS-20, Challenger, Sonora, Conquistador, Command, Mission, ADS-23, TBG 31, TBG 54, TBG 35, TBG 32, TBG 53, Tall Utah 52-70 ‘It’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Aug. 9, 2020, and evaluated on Dec. 12, 2020 (125 days), in a block that has been developed with especially high levels of Fusarium oxysporum race 2 and slight to moderate levels from Fusarium oxysporum race 4. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 11A, column 1 shows the characteristic and columns 2-13 show the results for TBG 28, TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-22, Hill's Special, ADS-20, and Challenger, respectively. Table 11B, column 1 shows the characteristic and columns 2-13 show the results for Sonora, Conquistador, Command, Mission, ADS-23, TBG 31, TBG 54, TBG 35, TBG 32, TBG 53, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively. NA indicates data not available.

TABLE 11A TBG 28 TBG 43 TBG 45 TBG 29 ADS-1 TBG 34 Plant height (cm) Average 6.4 84.6 83.1 60.4 9.9 21.2 Range (0-36) (78-93) (80-89)  (0-81) (0-27) (0-32) Whole plant weight (kg) Average NA 1.04 1.24 0.74 NA NA Range (0.53-1.33) (0.94-1.53)   (0-1.41) Trimmed plant weight Average NA 0.75 0.91 0.58 NA NA (kg @ 35.6 cm) Range (0.37-1)   (0.71-1.11)   (0-1.09) Number of outer Average NA 11.1 12.6 7.2 NA NA petioles (>35.6 cm) Range  (9-14) (11-14)  (0-11) Number of inner Average NA 4.4 4.3 3.3 NA NA petioles (<35.6 cm) Range (3-5) (3-6) (0-5) Length of outer petioles Average 2.2 26.6 32.1 20.0 3.8 8.1 to the joint (cm) Range (0-12) (21.3-29)   (26.7-38)    (0-27) (0-12) (0-14) Width of outer petioles Average NA 21.7 23.0 16.3 NA NA at the midrib (mm) Range (17.3-24.7)   (22-24.7)  (0-26) Thickness of outer petioles Average NA 11.9 11.0 9.1 NA NA at the midrib (mm) Range  (9.7-13.3)   (10-12.7)   (0-13.7) Petiole smoothness NA Smooth Smooth/ Smooth/ NA NA Slight rib Slight rib Petiole cup NA Cup Slight Cup NA NA cup/Cup % Marketable NA 80% 100% 30% NA NA Disease: Survival rate (%) Healthy  0% 80% 100% 30%  0%  0% Dying 35% 20%  0% 50% 47% 80% Dead 65%  0%  0% 20% 53% 20% Overall fusarium ratings Average 0.6 4.8 5 3 0.9 1.9 (0 = dead, 5 = tolerant) Range (0-2)  (3-5) (5-5) (0-4) (0-3)  (0-3)  Root fusarium ratings Average 0.4 3.6 5 3 0.7 1.1 (0 = dead, 5 = tolerant) Range (0-1)  (1-5) (4-5) (0-4) (0-2)  (0-2)  Hill's TBG 37 TBG 33 ADS-22 Special ADS-20 Challenger Plant height (cm) Average 37.3 4.1 16.5 7.7 10.5 24.4 Range (0-58)  (0-27) (0-63) (0-35)  (0-33)  (0-56) Whole plant weight (kg) Average NA NA NA NA NA NA Range Trimmed plant weight Average NA NA NA NA NA NA (kg @ 35.6 cm) Range Number of outer Average NA NA NA NA NA NA petioles (>35.6 cm) Range Number of inner Average NA NA NA NA NA NA petioles (<35.6 cm) Range Length of outer petioles Average 15.9 1.3 5.3 2.6 4.1 8.4 to the joint (cm) Range (0-25) (0-8) (0-22) (0-12)  (0-14)  (0-21) Width of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Thickness of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Petiole smoothness NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA % Marketable NA NA NA NA NA NA Disease: Survival rate (%) Healthy  0%  0%  0%  0%  0% 10% Dying 80% 27% 30% 32% 50% 50% Dead 20% 73% 70% 68% 50% 40% Overall fusarium ratings Average 3.2 0.5 1.1 0.7 1.2 1.8 (0 = dead, 5 = tolerant) Range (0-5)  (0-3) (0-4)  (0-2)  (0-3) (0-3) Root fusarium ratings Average 0.8 0.3 0.4 0.5 0.7 1.2 (0 = dead, 5 = tolerant) Range (0-1)  (0-1) (0-2)  (0-1)  (0-2) (0-2)

TABLE 11B Sonora Conquistador Command Mission ADS-23 TBG 31 Plant height (cm) Average 12.6 15.4 12.8 14.0 0.0 1.5 Range (0-33) (0-37) (0-38) (0-30) (0-0)  (0-13) Whole plant weight (kg) Average NA NA NA NA NA NA Range Trimmed plant weight Average NA NA NA NA NA NA (kg @ 35.6 cm) Range Number of outer petioles Average NA NA NA NA NA NA (>35.6 cm) Range Number of inner petioles Average NA NA NA NA NA NA (<35.6 cm) Range Length of outer petioles Average 4.8 4.1 3.7 4.6 0.0 0.6 to the joint (cm) Range (0-14) (0-14) (0-12) (0-10) (0-0) (0-8) Width of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Thickness of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Petiole smoothness NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA % Marketable NA NA NA NA NA NA Disease: Survival rate (%) Healthy  0%  0%  0%  0% 0%  0% Dying 48% 58% 45% 60% 0% 12% Dead 52% 42% 55% 40% 100%  88% Overall fusarium ratings Average 0.8 1 0.9 1.1 0.0 0.2 (0 = dead, 5 = tolerant) Range (0-2)  (0-2)  (0-2)  (0-2)  (0-0) (0-1) Root fusarium ratings Average 0.6 0.7 0.5 0.7 0.0 0.2 (0 = dead, 5 = tolerant) Range (0-1)  (0-2)  (0-1)  (0-1)  (0-0) (0-1) Tall Utah 52-70 ‘R’ Tall Utah TBG 54 TBG 35 TBG 32 TBG 53 Strain 52-75 Plant height (cm) Average 5.0 0.6 3.4 3.0 1.7 1.7 Range  (0-22)  (0-12)  (0-23)  (0-20) (0-19)  (0-22) Whole plant weight (kg) Average NA NA NA NA NA NA Range Trimmed plant weight Average NA NA NA NA NA NA (kg @ 35.6 cm) Range Number of outer petioles Average NA NA NA NA NA NA (>35.6 cm) Range Number of inner petioles Average NA NA NA NA NA NA (<35.6 cm) Range Length of outer petioles Average 2.8 0.3 1.2 1.3 0.8 0.7 to the joint (cm) Range (0-8) (0-6) (0-9) (0-8) (0-10) (0-8) Width of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Thickness of outer petioles Average NA NA NA NA NA NA at the midrib (mm) Range Petiole smoothness NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA % Marketable NA NA NA NA NA NA Disease: Survival rate (%) Healthy  0% 0%  0%  0%  0%  0% Dying 37% 5% 22% 22% 12% 12% Dead 63% 95%  78% 78% 88% 88% Overall fusarium ratings Average 0.4 0.1 0.4 0.5 0.3 0.3 (0 = dead, 5 = tolerant) Range (0-1) (0-1) (0-2) (0-1) (0-1)  (0-2) Root fusarium ratings Average 0.4 0.1 0.3 0.5 0.3 0.3 (0 = dead, 5 = tolerant) Range (0-1) (0-1) (0-1) (0-1) (0-1)  (0-1)

As shown in Tables 11A and 11B, under these conditions TBG 45 demonstrated excellent tolerance to both Fusarium oxysporum race 2 and race 4 as can be noted by fusarium ratings, marketability, and survivable rates. TBG 43 did not perform as well as TBG 45, and TBG 29 performed even worse, but they were the next best performing varieties in the trial. All three varieties are noted for tolerance to race 2 so the primary marketable differences between them in this trial is their tolerance level to race 4. All other varieties were very susceptible.

Tables 12A and 12B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 29, ADS-1, TBG 37, TBG 33, ADS-20, Challenger, Sonora, Conquistador, Mission, Tall Utah 52-70 ‘It’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Aug. 22, 2017, and evaluated on Dec. 17, 2017 (117 days). This trial was grown in a production block that has been developed with especially high levels of Fusarium oxysporum race 4 levels in order to evaluate and develop varieties for increased tolerance to the disease. Not only is this field especially high in the disease, but it is also the location where the disease was first identified. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 12A, column 1 shows the characteristic and columns 2-8 show the results for TBG 28, TBG 43, TBG 29, ADS-1, TBG 37, TBG 33, and ADS-20, respectively. Table 12B, column 1 shows the characteristic and columns 2-7 show the results for Challenger, Sonora, Conquistador, Mission, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively. NA indicates data not available.

TABLE 12A TBG 28 TBG 43 TBG 29 ADS-1 TBG 37 TBG 33 ADS-20 Plant height (cm) Average 0.3 52.4 5.5 0.7 5.5 2.2 4.7 Range  (0-35) (0-75) (0-75)  (0-32) (0-59) (0-37) (24-46) Whole plant weight (kg) Average 0.00 0.74 0.10 0.00 0.04 0.01 0.03 Range   (0-0.32)   (0-1.32)   (0-1.76)   (0-0.26)  (0-0.6)   (0-0.45) (0.08-0.52) Trimmed plant weight Average NA 0.59 0.08 NA 0.02 NA 0.01 (kg @ 35.6 cm) Range   (0-1.02)   (0-1.52)   (0-0.51)   (0-0.41) Number of outer petioles Average NA 6.9 1.0 NA 0.4 NA 0.1 (>35.6 cm) Range (0-12) (0-13) (0-11) (0-8) Number of inner petioles Average NA 4.7 0.7 NA 0.3 NA 0.2 (<35.6 cm) Range (0-11) (0-10) (0-7)  (0-9) Length of outer petioles Average 0.1 19.4 2.0 0.2 2.1 0.9 2.0 to the joint (cm) Range   (0-11.3) (0-28) (0-34) (0-12) (0-22) (0-18)  (9.7-19.7) Width of outer petioles Average NA 17.6 2.0 NA 0.7 NA 2.0 at the midrib (mm) Range   (0-25.3)   (0-27.7)   (0-19.3)  (9.7-19.7) Thickness of outer petioles Average NA 8.1 0.9 NA 0.4 NA 0.3 at the midrib (mm) Range (0-13)   (0-11.3)  (0-9.3)   (0-17.7) Petiole smoothness NA Smooth Smooth/ NA Smooth/ NA Slight rib Slight rib Slight rib Petiole cup NA Cup Cup NA Cup NA Cup % Marketable 1% 75% 9% 0%  4% 0%  2% % Survivors 0% 75% 9% 2% 14% 7% 14%

TABLE 12B Tall Utah 52-70 ‘R’ Tall Utah Challenger Sonora Conquistador Mission Strain 52-75 Plant height (cm) Average 2.5 5.0 3.0 5.6 1.1 0.0 Range (0-51) (0-40)   (0-39)   (23-46) (20-32) (0-0) Whole plant weight (kg) Average 0.02 0.04 0.02 0.04 0.00 0.00 Range   (0-0.77) (0-0.54) (0-0.33) (0.04-0.4)    (0-0.12) (0-0) Trimmed plant weight Average 0.01 NA NA NA NA NA (kg@ 35.6 cm) Range   (0-0.68) Number of outer petioles Average 0.2 NA NA NA NA NA (>35.6 cm) Range (0-11) Number of inner petioles Average 0.1 NA NA NA NA NA (< 35.6 cm) Range (0-7)  Length of outer petioles Average 1.0 1.9 1.2 2.3 0.4 0.0 to the joint (cm) Range   (0-21.3) (0-15.7) (0-15.3)  (8.3-17.7)   (0-13.3) (0-0) Width of outer petioles Average 0.4 NA NA NA NA NA at the midrib (mm) Range (0-21) Thickness of outer petioles Average 0.2 NA NA NA NA NA at the midrib (mm) Range (0-10) Petiole smoothness NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA % Marketable 1%  0%  0%  0% 0% 0% % Survivors 6% 16% 10% 16% 4% 0%

As shown in Tables 12A and 12B, under the Fusarium oxysporum race 4 conditions of this trial most varieties had a few to several plants that were still alive at evaluation but were not able to sustain development of marketable celery stalks. Most were barely alive and most of the data were not collected for the non-marketable stalks (marked as NA=not available). Under these conditions TBG 43 was moderately tolerant (75% marketable) and TBG 29 produced 9% marketable stalks.

Tables 13A and 13B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-20, Challenger, Sonora, Conquistador, Mission, ADS-23, TBG 31, TBG 54, TBG 35, TBG 32, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Aug. 28, 2018, and evaluated on Jan. 13, 2019 (138 days). This trial was grown in a production block that has been developed with especially high levels of Fusarium oxysporum race 4 levels in order to evaluate and develop varieties for increased tolerance to the disease. Not only is this field especially high in the disease, but it is also the location where the disease was first identified. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 13A, column 1 shows the characteristic and columns 2-11 show the results for TBG 28, TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-20, and Challenger, respectively. Table 13B, column 1 shows the characteristic and columns 2-11 show the results for Sonora, Conquistador, Mission, ADS-23, TBG 31, TBG 54, TBG 35, TBG 32, Tall Utah 52-70 ‘It’ Strain, and Tall Utah 52-75, respectively. NA indicates data not available.

TABLE 13A TBG 28 TBG 43 TBG 45 TBG 29 ADS-1 TBG 34 Plant height (cm) Average 1.1 61.0 68.0 44.7 1.7 18.3 Range (0-30) (0-74) (64-73) (0-66) (0-43)   (0-58) Whole plant weight (kg) Average 0.00 0.82 1.0 0.63 0.01 0.14 Range  (0-0.1)   (0-1.52) (0.62-1.34)   (0-1.42) (0-0.37)   (0-0.86) Trimmed plant weight Average NA 0.69 0.77 0.54 NA NA (kg @ 35.6 cm) Range   (0-1.26) (0.46-1.07)   (0-1.25) Number of outer petioles Average NA 9.3 11.10 6.0 NA NA (>35.6 cm) Range (0-14)  (9-13) (0-15) Number of inner petioles Average NA 5.5 4.2 0.5 NA NA (<35.6 cm) Range (0-8)  (3-5) (0-12) Length of outer petioles Average 0.4 20.5 28.7 15.9 NA 6.8 to the joint (cm) Range (0-10) (0-28) (26.3-34)   (0-24) (0-23) Width of outer petioles Average NA 19.7 23.0 13.1 NA NA at the midrib (mm) Range (0-25)   (19-25.3)   (0-25.7) Thickness of outer petiole Average NA 9.2 9.7 5.5 NA NA at the midrib (mm) Range   (0-12.3)  (5.7-12.7) (0-11) % Marketable 0% 70% 100% 30% 0% 10% % Survivors 5% 80% 100% 85% 6% 40% TBG 37 TBG 33 ADS-20 Challenger Plant height (cm) Average 43.0 1.5 14.2 3.6 Range (24-69) (0-36) (0-47) (0-66) Whole plant weight (kg) Average 0.28 0.01 0.08 0.05 Range (0.03-0.92)   (0-0.65)   (0-0.48)   (0-1.39) Trimmed plant weight Average NA NA NA NA (kg @ 35.6 cm) Range Number of outer petioles Average NA NA NA NA (>35.6 cm) Range Number of inner petioles Average NA NA NA NA (<35.6 cm) Range Length of outer petioles Average 18.5 0.6 5.2 1.3 to the joint (cm) Range  (7-32) (0-12) (0-17) (0-30) Width of outer petioles Average NA NA NA NA at the midrib (mm) Range Thickness of outer petioleat Average NA NA NA NA the midrib (mm) Range % Marketable  0% 0% 0% 0% % Survivors 88% 5% 42% 8%

TABLE 13B Tall Utah Tall 52-70 ‘R’ Utah Sonora Conquistador Mission ADS-23 TBG 31 TBG 54 TBG 35 TBG 32 Strain 52-75 Plant height (cm) Average 5.3 3.8 10.0 0.0 10.3 0.2 0.0 0.5 0.0 0.0 Range (0-47) (13-50) (0-52) (0-0) (0-57) (0-19) (0-0)  (0-20) (0-0) (0-0) Whole plant weight Average 0.05 0.03 0.00 0.0 0.07 0.00 0.0 0.00  0.00  0.00 (kg) Range   (0-0.54) (0.02-0.6)  (0-0)  (0-0)   (0-0.63) (0-0)  (0-0)   (0-0.08) (0-0) (0-0) Trimmed plant weight Average NA NA NA 0.0 NA NA 0.0 NA 0.0 0.0 (kg @ 35.6 cm) Range (0-0) (0-0) (0-0) (0-0) Number of outer Average NA NA NA 0.0 NA NA 0.0 NA 0.0 0.0 petioles (>35.6 cm) Range (0-0) (0-0) (0-0) (0-0) Number of inner Average NA NA NA 0.0 NA NA 0.0 NA 0.0 0.0 petioles (<35.6 cm) Range (0-0) (0-0) (0-0) (0-0) Length of outer petioles Average 1.8 1.4 3.5 0.0 NA NA 0.0 0.2 0.0 0.0 to the joint (cm) Range (0-16)  (5-20) (0-17) (0-0) (0-0) (0-7) (0-0) (0-0) Width of outer petioles Average NA NA NA 0.0 NA NA 0.0 NA 0.0 0.0 at the midrib (mm) Range (0-0) (0-0) (0-0) (0-0) Thickness of outer Average NA NA NA 0.0 NA NA 0.0 NA 0.0 0.0 petioles at the midrib Range (0-0) (0-0) (0-0) (0-0) (mm) % Marketable  0%  0%  0% 0% 10% 0% 0% 0% 0% 0% % Survivors 15% 14% 25% 0% 27% 1% 0% 3% 0% 0%

As shown in Tables 13A and 13B, under the fusarium conditions of this trial most varieties had a few to several plants that were still alive at evaluation but were not able to sustain development of marketable celery stalks. Most were barely alive and most of the data were not collected for the non-marketable stalks (marked as NA=not available). Under these conditions TBG 45 was very tolerant (100% marketable), TBG 43 was moderately tolerant (70% marketable) and TBG 29 produced 30% marketable stalks. No other varieties produced marketable stalks.

Tables 14A and 14B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-22, ADS-20, Floribelle, ADS-23, TBG 31, TBG 54, ADS-2, ADS-8, TBG 35, TBG 32, and TBG 53. The trial was transplanted in Oxnard, California on Aug. 14, 2019, and evaluated on Dec. 23, 2019 (131 days). This trial was grown in a production block that has been developed with especially high levels of Fusarium oxysporum race 4 levels in order to evaluate and develop varieties for increased tolerance to the disease. Not only is this field especially high in the disease, but it is also the location where the disease was first identified. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 14A, column 1 shows the characteristic and columns 2-11 show the results for TBG 28, TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-22, and ADS-20, respectively. Table 14B, column 1 shows the characteristic and columns 2-10 show the results for Floribelle, ADS-23, TBG 31, TBG 54, ADS-2, ADS-8, TBG 35, TBG 32, and TBG 53, respectively. NA indicates data not available.

TABLE 14A TBG 28 TBG 43 TBG 45 TBG 29 ADS-1 TBG 34 TBG 37 TBG 33 ADS-22 ADS-20 Plant height (cm) Average NA 32.70 80.10 NA NA NA NA NA NA NA Range (0-74) (0-85) Whole plant weight (kg) Average NA 0.65 1.35 NA NA NA NA NA NA NA Range   (0-1.42)  (0-1.5) Trimmed plant weight Average NA 0.31 1.15 NA NA NA NA NA NA NA (kg @ 35.6 cm) Range  (0-1.1)   (0-1.32) Length of outer petioles Average NA 12.4 28.2 NA NA NA NA NA NA NA to the joint (cm) Range (0-27) 0-35 % Survival 9% 37% 81% 16% 24% 31% 8% 18% 17% 10% % Marketable 0% 35% 80%  0%  0%  0% 0%  0%  0%  0%

TABLE 14B Floribelle ADS-23 TBG 31 TBG 54 ADS-2 ADS-8 TBG 35 TBG 32 TBG 53 Plant height (cm) Average NA NA NA NA NA NA NA NA NA Range Whole plant weight (kg) Average NA NA NA NA NA NA NA NA NA Range Trimmed plant weight Average NA NA NA NA NA NA NA NA NA (kg @ 35.6 cm) Range Length of outer petioles Average NA NA NA NA NA NA NA NA NA to the joint (cm) Range % Survival 21% 15% 4% 23% 42% 12% 33% 39% 52% % Marketable  0%  0% 0%  0%  0%  0%  0%  0%  0%

As shown in Tables 14A and 14B, under the fusarium conditions of this trial most varieties had a few to several plants that were still alive at evaluation but were not able to sustain development of marketable celery stalks. Most were barely alive. However, TBG 43 and TBG 45 were each able to produce marketable celery stalks. TBG 43 was fairly tolerant (35% marketable) and essentially all survivors were marketable. Essentially all survivors of TBG 45 were marketable and at 80% marketable showed good tolerance for race 4.

Table 15 shows the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-20, and Command. The trial was transplanted in Oxnard, California on Apr. 17, 2020, and evaluated on Jul. 7, 2020 (81 days). This trial was grown in a production block that has been developed with especially high levels of Fusarium oxysporum race 4 in order to evaluate and develop varieties for increased tolerance to the disease. Not only is this field especially high in the disease, but it is also the location where the disease was first identified. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. In order to increase the impact of the disease in the spring, this trial was transplanted late in the season when the soil temperature (active temperature for the disease) was higher and the celery was not able to reach full maturity due to a mandated celery free window in Ventura County. Table 15, column 1 shows the characteristic and columns 2-11 show the results for TBG 28, TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-20, and Command, respectively. NA indicates data not available.

TABLE 15 TBG 28 TBG 43 TBG 45 TBG 29 ADS-1 TBG 34 TBG 37 TBG 33 ADS-20 Command Plant height (cm) Average NA 23.20 57.4 NA NA NA 3.4 NA NA NA Range  (0-49) (54-60) (0-34)   Whole plant weight (kg) Average NA 0.20 0.6 NA NA NA 0.0 NA NA NA Range   (0-0.46) (0.46-0.7)  (0-0.14) Number of outer petioles Average NA 1.10 9.30 NA NA NA NA NA NA NA (>35.6 cm) Range (0-5)  (8-10) Number of inner petioles Average NA 3.0 4.4 NA NA NA NA NA NA NA (<35.6 cm) Range (0-7) (4-5) Length of outer petioles Average NA 9.1 22.2 NA NA NA 1.3 NA NA NA to the joint (cm) Range  (0-20) (19.7-24)   (0-12.7) % Survival 0% 46%  95% 5% 0% 0% 6% 0% 0% 0% % Marketable 0% 40% 100% 0% 0% 0% 0% 0% 0% 0%

As shown in Tables 15A and 15B, under the fusarium conditions of this trial TBG 29 and TBG 37 each had a few plants that survived but only TBG 43 and TBG 45 had marketable potential. TBG 43 was moderately tolerant (46% marketable) and TBG 49 had good tolerance (95% marketable). No other conventional class celery showed tolerance and all transplants for TBG 28 died.

Tables 16A, 16B, and 16C show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-22, Hill's Special, ADS-20, Challenger, Sonora, Conquistador, Command, Mission, Floribelle, ADS-23, TBG 31, TBG 54, TBG 35, TBG 32, TBG 53, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Aug. 19, 2020, and evaluated on Dec. 2, 2020 (105 days). This trial was grown in a production block that has been developed with especially high levels of Fusarium oxysporum race 4 levels in order to evaluate and develop varieties for increased tolerance to the disease. Not only is this field especially high in the disease, but it is also the location where the disease was first identified. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 16A, column 1 shows the characteristic and columns 2-10 show the results for TBG 28, TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, and ADS-22, respectively. Table 16B, column 1 shows the characteristic and columns 2-9 show the results for Hill's Special, ADS-20, Challenger, Sonora, Conquistador, Command, Mission, and Floribelle, respectively. Table 16C, column 1 shows the characteristic and columns 2-9 show the results for ADS-23, TBG 31, TBG 54, TBG 35, TBG 32, TBG 53, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively. NA indicates data not available.

TABLE 16A TBG 28 TBG 43 TBG 45 TBG 29 ADS-1 TBG 34 TBG 37 TBG 33 ADS-22 Plant height (cm) Average 0.0 40.5 70.3 8.8 5.5 1.9 0.6 0.0 3.7 Range (0-0) (0-70) (68-74) (0-49) (0-25) (0-18) (0-9) (0-0) (0-34) Whole plant Average NA 0.37 0.87 0.06 NA NA NA NA NA weight (kg) Range (0-0.82) (0.74-1.01) (0-0.39) Trimmed plant Average NA 0.30 0.69 0.05 NA NA NA NA NA weight Range (0-0.67) (0.6-0.81) (0-0.36) (kg @ 35.6 cm) Number of outer Average NA 4.4 9.9 0.7 NA NA NA NA NA petioles Range (0-9) (8-11) (0-4) (>35.6 cm) Number of inner Average NA 5.5 6.7 1.2 NA NA NA NA NA petioles Range (0-10) (6-8) (0-6) (<35.6 cm) Length of outer Average 0.0 14.5 28.8 2.7 3.2 0.7 0.1 0.0 1.1 petioles to the Range (0-0) (0-27) (26-32) (0-13.7) (0-12) (0-7) (0-2) (0-0) (0-11) joint (cm) Width of outer Average NA 10.7 22.9 3.1 NA NA NA NA NA petioles at the Range (0-20) (20.3-25) (0-16) midrib (mm) Thickness of outer Average NA 5.7 10.3 1.7 NA NA NA NA NA petioles at the Range (0-11.3) (9.3-11.3) (0-9) midrib (mm) Petiole smoothness NA Smooth/ Smooth/ Slight rib NA NA NA NA NA Slight rib Slight rib Petiole cup NA Cup/ Cup Cup NA NA NA NA NA Deep cup % Marketable 0% 50% 94%  0%  0%  0% 0% 0%  0% Disease: Survival rate (%) Healthy 0% 74% 95% 18%  0%  0% 0% 0%  2% Dying 0%  3%  3% 10% 17% 12% 7% 0% 13% Dead 100%  23%  3% 82% 83% 88% 93%  100%  85% Overall fusarium Average 0 2.5 4.5 1.5 0 0 0 0 0 ratings (0 = dead, Range (0-0) (0-5) 4-5 (0-5) 0-1 (0-1) 0-1 (0-0) (0-3) 5 = tolerant)

TABLE 16B Hill's Special ADS-20 Challenger Sonora Conquistador Command Mission Floribelle Plant height (cm) Average 1.2 1.5 NA NA NA NA NA 0.0 Range (0-18) (0-21) (0-0) Whole plant weight Average NA NA NA NA NA NA NA NA (kg) Range Trimmed plant Average NA NA NA NA NA NA NA NA weight Range (kg @ 35.6 cm) Number of outer Average NA NA NA NA NA NA NA NA petioles (>35.6 cm) Range Number of inner Average NA NA NA NA NA NA NA NA petioles Range (<35.6 cm) Length of outer Average 0.6 0.5 NA NA NA NA NA 0.0 petioles to the joint Range (0-8) (0-7) (0-0) (cm) Width of outer Average NA NA NA NA NA NA NA NA petioles at the Range midrib (mm) Thickness of outer Average NA NA NA NA NA NA NA NA petioles at the Range midrib (mm) Petiole smoothness NA NA NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA NA NA % Marketable  0%  0%  0%  0% 0%  0%  0% 0% Disease: Survival rate (%) Healthy  0%  0%  0%  0% 0%  0%  0% 0% Dying 13% 10% 13% 11% 8% 15% 10% 0% Dead 87% 90% 87% 89% 92%  85% 90% 100%  Overall fusarium Average 0 1 0 0 0 0 0 0 ratings (0 = dead, Range 0-1 (0-1) 0-1 0-1 0-1 0-1 0-1 (0-0) 5 = tolerant)

TABLE 16C Tall Utah 52-70 ‘R’ Tall Utah ADS-23 TBG 31 TBG 54 TBG 35 TBG 32 TBG 53 Strain 72-75 Plant height (cm) Average 0.7 2.9 0.0 0.0 0.5 0.5 NA NA Range (0-18) (0-28) (0-0) (0-0) (0-15) (0-11) Whole plant weight Average NA NA NA NA NA NA NA NA (kg) Range Trimmed plant Average NA NA NA NA NA NA NA NA weight Range (kg @ 35.6 cm) Number of outer Average NA NA NA NA NA NA NA NA petioles (>35.6 cm) Range Number of inner Average NA NA NA NA NA NA NA NA petioles Range (<35.6 cm) Length of outer Average 0.3 1.1 0.0 0.0 0.2 0.1 NA NA petioles to the joint Range (0-5) (0-12) (0-0) (0-0) (0-5) (0-3) (cm) Width of outer Average NA NA NA NA NA NA NA NA petioles at the Range midrib (mm) Thickness of outer Average NA NA NA NA NA NA NA NA petioles at the Range midrib (mm) Petiole smoothness NA NA NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA NA NA % Marketable 0%  0% 0% 0% 0% 0% 0% 0% Disease: Survival rate (%) Healthy 0%  2% 0% 0% 0% 0% 0% 0% Dying 4% 13% 0% 0% 5% 5% 7% 1% Dead 96%  85% 100%  100%  95%  95%  93%  99%  Overall fusarium Average 0 0 0 0 0 0 0 0 ratings (0 = dead, Range 0-1 (0-2) (0-0) (0-0) (0-1) (0-1) 0-1 0-1 5 = tolerant)

As shown in Tables 16A, 16B, and 16C, under the fusarium conditions of this trial TBG 29 had a few plants that had slightly better vigor but with only 18% survival and an average fusarium rating of 1.5 even the strongest of the plants were not marketable. Under the fusarium conditions of this trial which has been developed to be stronger than traditionally infected fields, TBG 43 tolerance is starting to break down with 74% survival and 50% marketable. TBG 45 which was specifically bred for tolerance to race 4 had 94% marketability and was very tolerant (4-5 rating). No other variety showed any potential under these conditions.

Tables 17A and 17B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, Hill's Special, ADS-20, Challenger, Sonora, Conquistador, Command, Mission, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Dec. 18, 2017, and evaluated on May 7, 2018 (140 days). This trial was grown in a normal production field that had moderate pressure for bolting (455 hours below 50° F.), measured by seed stem length. The only characteristics measured for varieties with an average seed stem length of 10 cm and higher were plant height, length of outer petioles at the joint, and seed stem length. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 17A, column 1 shows the characteristic and columns 2-9 show the results for TBG 28, TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, and Hill's Special, respectively. Table 17B, column 1 shows the characteristic and columns 2-9 show the results for ADS-20, Challenger, Sonora, Conquistador, Command, Mission, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively. NA indicates data not available.

TABLE 17A TBG 28 TBG 43 TBG 29 ADS-1 TBG 34 TBG 37 TBG 33 Hill's Special Plant height (cm) Average 91.0 85.2 81.1 80.5 76.3 88.2 90.1 73.8 Range (82-99) (81-90) (72-91) (72-85) (69-85) (79-94) (80-97) (69-77) Whole plant weight (kg) Average NA NA NA NA 1.43 NA NA 1.42 Range (0.62-1.95) (1.16-2.05) Trimmed plant weight Average NA NA NA NA 1.10 NA NA 1.12 (kg @ 35.6 cm) Range (0.49-1.47) (0.92-1.59) Number of outer petioles Average NA NA NA NA 15.0 NA NA 16.30 (>35.6 cm) Range (12-18) (11-20) Number of inner petioles Average NA NA NA NA 7.9 NA NA 12.2 (<35.6 cm) Range (6-10) (9-15) Length of outer petioles to Average 48.0 36.7 34.6 37.4 32.9 39.0 39.1 37.1 the joint (cm) Range (41.3-52.3) (33.7-41.3) (31-38.7) (33.3-43) (28-36.3) (35-45.7) (36-42) (34-39.7) Width of outer petioles at Average NA NA NA NA 31.8 NA NA 27.2 the midrib (mm) Range (23.7-38) (22-33) Thickness of outer petioles Average NA NA NA NA 9.1 NA NA 8.6 at the midrib (mm) Range (6.7-10.7) (7.7-10.3) Seed stem length (cm) Average 30.6 13.5 30.7 24.3 0.5 47.4 50.4 2.8 Range (19-38) (0.5-37) (8-57) (5-43) (0-1) (4-67) (15-74) (0-14) Median 31.5 9.5 29.5 28.5 0.5 53.5 47.5 0.5 Petiole color (Munsell color chart) NA NA NA NA 5gy 5/10 NA NA 2.5gy 5/4 Leaf color (Munsell color chart) NA NA NA NA 5gy 4/8 NA NA 5gy 5/4 Petiole smoothness NA NA NA NA Slight Rib NA NA Slight Rib Petiole cup NA NA NA NA Slight NA NA Cup cup/Cup % Marketable 0% 50% 10% 30% 100% 10% 0% 90%

TABLE 17B Tall Utah 52-70 ‘R’ Tall Utah ADS-20 Challenger Sonora Conquistador Command Mission Strain 52-75 Plant height (cm) Average 73.6 85.1 78.0 80.8 81.3 82.1 88.8 80.5 Range (70-76) (71-94) (71-83) (73-86) (76-87) (77-86) (81-98) (71-97) Whole plant weight (kg) Average 1.24 NA NA NA NA NA NA NA Range (0.73-1.6) Trimmed plant weight Average 0.98 NA NA NA NA NA NA NA (kg @ 35.6 cm) Range (0.58-1.24) Number of outer petioles Average 14.60 NA NA NA NA NA NA NA (>35.6 cm) Range (11-17) Number of inner petioles Average 10.6 NA NA NA NA NA NA NA (<35.6 cm) Range (9-13) Length of outer petioles to Average 37.0 38.9 39.7 40.7 38.6 41.7 30.8 31.0 the joint (cm) Range (34.3-39.7) (35-49.3) (37-42.3) (36-43) (33.3-43.7) (37.3-44.3) (26.7-36) (26.3-36.7) Width of outer petioles at Average 27.6 NA NA NA NA NA NA NA the midrib (mm) Range (21.3-32.7) Thickness of outer petioles Average 8.7 NA NA NA NA NA NA NA at the midrib (mm) Range (7-10) Seed stem length (cm) Average 0.4 40.3 21.4 28.4 27.1 26.6 70.9 44.2 Range (0-0.5) (23-55) (13-32) (0-52) (5-57) (6-68) (53-87) (10-65) Median 0.5 39.5 18.5 31.5 24.5 19.0 70.5 47.5 Petiole color (Munsell color chart) 5gy 5/10 NA NA NA NA NA NA NA Leaf color (Munsell color chart) 2.5gy 5/4 NA NA NA NA NA NA NA Petiole smoothness Slight NA NA NA NA NA NA NA rib/Rib Petiole cup Cup NA NA NA NA NA NA NA % Marketable 100% 0% 0% 0% 10% 20% 0% 0%

As shown in Tables 17A and 17B, under these conditions ADS-20 and TBG 34 were the most bolting tolerant with essentially no seed stem development and were 100% marketable. Hill's Special, with only 90% marketability and slightly worse seed stem development, was slightly worse. TBG 28 was the next most bolting tolerant and was 50% marketable. Sonora, ADS-1, Mission, Command, and Conquistador all fell into the middle moderate tolerance zone with seed stems that were in the mid to upper 20 cm range; however, of these the best marketable was ADS-1 with 30% marketable. Tall Utah 52-70 ‘R’ Strain was the most susceptible of the varieties, as would be expected for the susceptible check.

Tables 18A and 18B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, Hill's Special, ADS-20, Challenger, Sonora, Conquistador, Command, Mission, ADS-22, TBG 31, TBG 54, ADS-8, TBG 35, TBG 32, TBG 53, Tall Utah 52-70 ‘It’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Dec. 19, 2019, and evaluated on Apr. 26, 2020 (129 days). This trial was grown in a normal production field that had moderate to heavy pressure for bolting (864 hours below 50° F.), measured by seed stem length. The only characteristics measured for varieties with an average seed stem length of 10 cm and higher were length of outer petioles at the joint and seed stem length. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 18A, column 1 shows the characteristic and columns 2-13 show the results for TBG 28, TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, Hill's Special, ADS-20, Challenger, Sonora, and Conquistador, respectively. Table 18B, column 1 shows the characteristic and columns 2-12 show the results for Command, Mission, ADS-22, TBG 31, TBG 54, ADS-8, TBG 35, TBG 32, TBG 53, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively. NA represents no data available.

TABLE 18A TBG 28 TBG 43 TBG 29 ADS-1 TBG 34 TBG 37 TBG 33 Plant height Average NA NA NA NA 79.70 NA NA (cm) Range (75-85) Whole plant Average NA NA NA NA 1.23 NA NA weight (kg) Range (0.84-1.62) Trimmed plant Average NA NA NA NA 0.93 NA NA weight Range (0.66-1.22) (kg @ 35.6 cm) Number of Average NA NA NA NA 10.1 NA NA outer petioles Range (8-12) (>35.6 cm) Number of Average NA NA NA NA 7.2 NA NA inner petioles Range (5-8) (<35.6 cm) Length of outer Average NA NA NA NA 36.4 NA NA petioles to the Range (33.3-43) joint (cm) Width of outer Average NA NA NA NA 30.7 NA NA petioles at the Range (28.3-33.3) midrib (mm) Thickness of Average NA NA NA NA 10.9 NA NA outer petioles Range (10-12) at the midrib (mm) Seed stem Average 26.9 28.6 23.1 26.3 0.0 32.7 44.4 length (cm) Range (10-40) (12-46) (4-41) (6-37) (0-0) (23-55) (17-53) Median 26.5 28.5 22.0 27.5 0.0 30.5 48.0 Petiole color NA NA NA NA 5gy 5/6 NA NA (Munsell color) Leaf color NA NA NA NA 5gy 3/4 NA NA (Munsell color) Petiole smoothness NA NA NA NA Smooth/ NA NA Slight rib Petiole cup NA NA NA NA Cup NA NA % Marketable 10% 20% 30% 10% 100%  0% 0% Defects: % Butt pith NA NA NA NA 0% NA NA % Twist NA NA NA NA 0% NA NA Special ADS-20 Challenger Sonora Conquistador Plant height Average 71.70 70.00 NA NA NA (cm) Range (68-74) (62-75) Whole plant Average 1.13 1.00 NA NA NA weight (kg) Range (0.82-1.54) (0.74-1.28) Trimmed plant Average 0.90 0.81 NA NA NA weight Range (0.66-1.2) (0.6-1.02) (kg @ 35.6 cm) Number of Average 10.1 12.5 NA NA NA outer petioles Range (7-13) (11-14) (>35.6 cm) Number of Average 7.2 7.6 NA NA NA inner petioles Range (5-10) (6-9) (<35.6 cm) Length of outer Average 35.6 27.2 NA NA NA petioles to the Range (33-37.3) (24.7-29.3) joint (cm) Width of outer Average 28.2 27.2 NA NA NA petioles at the Range (22.3-31.3) (24.7-29.3) midrib (mm) Thickness of Average 9.9 9.2 NA NA NA outer petioles Range (8.7-11.7) (7.7-10) at the midrib (mm) Seed stem Average 4.3 0.0 35.2 31.6 36.1 length (cm) Range (0-20) (0-0) (24-56) (26-35) (17-47) Median 0.5 0.0 30.5 33.0 41.0 Petiole color 5gy 7/6 5gy 7/8 NA NA NA (Munsell color) Leaf color 5gy 3/4 5gy 3/4 NA NA NA (Munsell color) Petiole smoothness Smooth/ Smooth/ NA NA NA Slight rib Slight rib Petiole cup Cup Cup NA NA NA % Marketable 100% 100%  0% 0% 0% Defects: % Butt pith  40%  0% NA NA NA % Twist 100% 30% NA NA NA

TABLE 18B Tall Utah 52-70 ‘R’ Tall Utah Command Mission ADS-22 TBG 31 TBG 54 ADS-8 TBG 35 TBG 32 TBG 53 Strain 52-75 Plant height (cm) Average NA NA NA NA NA NA NA NA NA NA NA Range Whole plant Average NA NA NA NA NA NA NA NA NA NA NA weight (kg) Range Trimmed plant Average NA NA NA NA NA NA NA NA NA NA NA weight Range (kg @ 35.6 cm) Number of outer Average NA NA NA NA NA NA NA NA NA NA NA petioles (>35.6 Range cm) Number of inner Average NA NA NA NA NA NA NA NA NA NA NA petioles Range (<35.6 cm) Length of outer Average NA NA NA NA NA NA NA NA NA NA NA petioles to the Range joint (cm) Width of outer Average NA NA NA NA NA NA NA NA NA NA NA petioles at the Range midrib (mm) Thickness of Average NA NA NA NA NA NA NA NA NA NA NA outer petioles at Range the midrib (mm) Seed stem length Average 32.5 28.0 18.0 51.2 28.9 47.9 56.1 50.8 35.7 56.0 44.9 (cm) Range (25-43) (15-44) (13-26) (35-70) (23-35) (36-56) (44-68) (42-58) (18-52) (36-72) (22-71) Median 33.0 27.0 16.5 50.0 29.5 48.5 55.0 52.0 40.0 52.5 47.0 Petiole color NA NA NA NA NA NA NA NA NA NA NA (Munsell color) Leaf color NA NA NA NA NA NA NA NA NA NA NA (Munsell color) Petiole smoothness NA NA NA NA NA NA NA NA NA NA NA Petiole cup NA NA NA NA NA NA NA NA NA NA NA % Marketable 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% Defects: % Butt pith NA NA NA NA NA NA NA NA NA NA NA % Twist NA NA NA NA NA NA NA NA NA NA NA

As shown in Tables 18A and 18B, under these conditions ADS-20 and TBG 34 were the most bolting tolerant with no seed stem development, followed by Hill's Special. ADS-22 was the next most bolting tolerant followed by TBG 29. ADS-1 and TBG 28 were very similar and TBG 43 while similar was slightly poorer for seed stem development.

Tables 19A and 19B show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, ADS-20, Challenger, Sonora, Conquistador, Command, Mission, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Mar. 7, 2018, and evaluated on Jun. 22, 2018 (107 days) in a normal production field with low bolting pressure (443 hours at 50° F.). Tall Utah 52-70 ‘R’ Strain, considered the susceptible check for bolting, had fairly significant seed stem elongation while very little was observed in other varieties except Tall Utah 52-75. There were no other significant stress issues observed in this trial. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 19A, column 1 shows the characteristic and columns 2-9 show the results for TBG 28, TBG 43, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, and ADS-20, respectively. Table 19B, column 1 shows the characteristic and columns 2-8 show the results for Challenger, Sonora, Conquistador, Command, Mission, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively. NA indicates data not available.

TABLE 19A TBG 28 TBG 43 TBG 29 ADS-1 TBG 34 TBG 37 TBG 33 ADS-20 Plant height (cm) Average 93.8 85.4 76.6 75.2 79.6 84.9 89.4 73.4 Range (90-100) (79-90) (72-80) (72-80) (75-83) (79-89) (84-95) (66-78) Whole plant Average 1.54 1.42 1.37 1.54 1.34 1.20 1.28 1.25 weight (kg) Range (1.28-1.85) (0.82-1.87) (1.04-1.65) (1.15-1.74) (1.06-1.64) (0.91-1.49) (0.84-1.67) (0.85-1.66) Trimmed plant Average 1.11 1.04 1.31 1.22 1.01 0.89 0.91 0.96 weight Range (0.92-1.35) (0.64-1.29) (0.91-1.65) (0.92-1.38) (0.8-1.25) (0.65-1.16) (0.58-1.26) (0.7-1.22) (kg @ 35.6 cm) Number of outer Average 10.9 9.8 9.9 11.5 10.3 8.7 9.3 8.9 petioles (>35.6 cm) Range (9-12) (4-12) (8-12) (9-14) (10-11) (6-11) (7-11) (7-11) Number of inner Average 5.8 6.0 5.2 6.8 4.6 5.8 4.7 5.3 petioles (<35.6 cm) Range (5-7) (5-7) (3-7) (5-9) (3-6) (5-7) (3-8) (4-6) Length of outer Average 42.7 32.3 28.3 30.0 32.1 35.5 36.7 34.9 petioles to the Range (39.7-46.7) (30-34.7) (25-33.7) (27.3-32.7) (29.7-35.7) (31.7-39.3) (29-49.3) (30-37.3) joint (cm) Width of outer Average 30.4 28.8 30.9 31.2 32.4 30.2 30.2 30.5 petioles at the Range (29-32.3) (25.3-32) (26.7-35.7) (25.7-34.7) (27.3-36.3) (28-32.7) (21.7-35.7) (26-34.3) midrib (mm) Thickness of outer Average 11.4 11.7 11.7 11.4 10.7 10.2 10.0 10.6 petioles at the Range (10-12.7) (9-14) (10-13.3) (8.7-13.3) (9-12) (9.3-11.7) (8-12) (9.7-11.7) midrib (mm) Seed stem Average 0.0 0.0 0.0 0.0 0.0 0.0 0.5 0.0 length (cm) Range (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) (0-3) (0-0) Median 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Petiole color (Munsell color) 5gy 5/6 2.5gy 6/4 5gy 6/8 5gy 5/6 5gy 5/6 2.5gy 6/8 5gy 5/6 5gy 5/6 Leaf color (Munsell color) 5gy 3/4 5gy 5/4 5gy 5/4 5gy 4/4 7.5gy 4/2 5gy 4/4 5gy 4/4 5gy 3/4 Petiole smoothness Slight rib Smooth/ Rib Rib Rib Smooth/ Slight rib Slight rib Slight rib Slight rib Petiole cup Cup Cup Cup Cup/Deep cup Slight cup/ Cup Cup/Deep cup Cup Cup % Marketable 100%  100%  100% 100%  100%  100%  100%  100%  Defects: % Node crack 10%  20%   30% 70% 60% 0% 90% 80%  % Brown stem 0% 0%  0%  0%  0% 0%  0% 0% % Suckers 0% 0%  0%  0% 10% 0% 10% 0% % Feather leaf 0% 0% 100% 30%  0% 10%   0% 0%

TABLE 19B Tall Utah 52-70 ‘R’ Tall Utah Challenger Sonora Conquistador Command Mission Strain 52-75 Plant height (cm) Average 82.1 77.3 78.6 78.7 74.4 74.2 69.4 Range (76-86) (72-81) (74-84) (69-86) (70-78) (71-77) (63-76) Whole plant weight (kg) Average 1.38 1.53 1.33 1.36 1.40 1.21 1.36 Range (1.03-1.73) (1.12-2.08) (1.1-1.62) (1.02-1.81) (1.13-1.69) (0.65-1.77) (0.63-1.79) Trimmed plant weight Average 1.06 1.17 0.98 1.05 1.04 0.90 1.08 (kg @ 35.6 cm) Range (0.86-1.39) (0.87-1.54) (0.82-1.15) (0.76-1.39) (0.8-1.29) (0.5-1.4) (0.52-1.43) Number of outer petioles Average 10.3 11.7 10.2 11.5 11.4 11.9 11.6 (>35.6 cm) Range (8-13) (10-13) (9-12) (9-15) (9-14) (7-16) (9-14) Number of inner petioles Average 5.7 6.3 8.0 6.7 6.4 4.9 8.1 (<35.6 cm) Range (5-8) (3-8) (6-10) (5-8) (3-9) (2-7) (6-10) Length of outer petioles to Average 36.4 33.0 35.5 33.3 35.1 37.0 30.5 the joint (cm) Range (30-44.3) (28.3-38.3) (30.7-40.7) (27.7-38.7) (31.3-40) (29.7-47.7) (27.3-34.3) Width of outer petioles at Average 28.8 28.5 28.5 27.0 30.0 26.7 28.0 the midrib (mm) Range (26-31.3) (24.7-32.3) (25.3-32.3) (23.3-32.7) (27-33.7) (20.7-31) (20.3-31.7) Thickness of outer petioles Average 11.6 10.3 10.0 10.5 9.9 8.8 10.1 at the midrib (mm) Range (10-15) (9-12.3) (9-13.7) (8-12.3) (7.7-11.3) (6.3-11) (7.7-12) Seed stem length (cm) Average 0.1 0.2 0.1 0.1 0.2 22.9 6.1 Range (0-0.5) (0-1) (0-1) (0-0.5) (0-1) (1-60) (0-25) Median 0.0 0.0 0.0 0.0 0.0 23.0 1.5 Petiole color (Munsell color) 5gy 5/8 5gy 5/4 5gy 7/8 5gy 5/6 2.5gy 5/8 5gy 5/8 2.5gy 5/4 Leaf color (Munsell color) 5gy 4/6 5gy 4/4 5gy 4/4 5gy 6/10 5gy 4/8 5gy 5/4 5gy 5/4 Petiole smoothness Smooth/ Smooth/ Smooth/ Rib Rib Rib Slight rib/Rib Slight rib Slight rib Slight rib Petiole cup Cup/Deep cup Cup/Slight cup Cup Cup Cup Cup/Flat Cup % Marketable 100%  100%  100%  90% 100%  70% 70% Defects: % Node crack 100%  100%  30% 70% 40% 10% 90% % Brown stem  0%  0% 10%  0%  0% 50% 10% % Suckers 10% 10%  0%  0%  0%  0%  0% % Feather leaf 40% 50%  0% 40% 50% 70% 70%

As shown in Tables 19A and 19B, under these production conditions with low bolting pressure, the most significant seed stem development was observed in Tall Utah 52-70 ‘R’ Strain and Tall Utah 52-75. The only other seed stems observed were less than 3 cm in TBG 33, Command, Challenger, Mission, Sonora, and Conquistador. The remaining varieties (ADS-1, TBG 29, TBG 43, TBG 34, TBG 37, and ADS-20) were free from seed stems. TBG 28 was the tallest of varieties (plant height) followed by TBG 33. TBG 28 also had the longest petioles (length outer petiole to joint). TBG 43 and Challenger were the next tallest. However, height did not relate to yield as measured by trimmed plant weight. TBG 29 had the greatest yield followed by ADS-1, Sonora, and then TBG 28. TBG 43 was similar in yield (trimmed weight) compared to Mission, Challenger, Command, and TBG 34. TBG 43 was similar to TBG 29 for number outer petioles and ADS-1 and TBG 34 for length of outer petioles, and Challenger, Conquistador, Sonora, and Command for narrower width of outer petioles. However, TBG 43 was most similar to TBG 29, Challenger, ADS-1, and TBG 28 for thickest petioles. From a defect perspective, TBG 28 and TBG 43 had the least amount of node crack closely followed by TBG 29 and Conquistador. TBG 28, TBG 34, TBG 43, TBG 33, ADS-20, and Conquistador were also free from feather leaf

Tables 20A, 20B, and 20C show the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, Hill's Special, ADS-20, ADS-22, Challenger, Sonora, Conquistador, Command, Mission, ADS-23, TBG 31, TBG 54, ADS-8, TBG 35, TBG 32, TBG 53, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75. The trial was transplanted in Oxnard, California on Mar. 21, 2020, and evaluated on Jun. 28, 2020 (99 days) in a normal production field with moderate pressure due to Fusarium oxysporum race 2 and slight bolting pressure. Tall Utah 52-70 ‘R’ Strain, considered the susceptible check for both traits, was significantly impacted by fusarium while slightly impacted by bolting. The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 20A, column 1 shows the characteristic and columns 2-10 show the results for TBG 28, TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 33, and Hill's Special, respectively. Table 20B, column 1 shows the characteristic and columns 2-9 show the results for ADS-20, ADS-22, Challenger, Sonora, Conquistador, Command, Mission, and ADS-23, respectively. Table 20C, column 1 shows the characteristic and columns 2-9 show the results for TBG 31, TBG 54, ADS-8, TBG 35, TBG 32, TBG 53, Tall Utah 52-70 ‘R’ Strain, and Tall Utah 52-75, respectively. NA indicates data not available.

TABLE 20A Hill's TBG 28 TBG 43 TBG 45 TBG 29 ADS-1 TBG 34 TBG 37 TBG 33 Special Plant height Average 96.00 88.6 82.7 82.9 76.9 76.50 78.80 78.20 65.50 (cm) Range (92-100) (82-94) (81-85) (80-89) (70-81) (72-82) (76-82) (68-85) (56-70) Whole plant Average 1.27 1.49 1.66 1.51 1.23 1.18 1.25 1.18 1.02 weight (kg) Range (1.1-1.5) (1.24-1.76) (1.3-2.12) (1.12-2.14) (0.68-1.72) (1-1.34) (1.02-1.5) (0.84-1.44) (0.66-1.36) Trimmed plant Average 1.01 1.09 1.3 1.17 0.60 0.87 0.94 0.53 0.79 weight (kg Range (0-1.5) (0.9-1.3) (1.02-1.7) (0.9-1.56) (0-1.32) (0-1.12) (0.74-1.06) (0-1.16) (0-1.8) @ 35.6 cm) Number of outer Average 10.6 10.4 12.0 11.0 6.2 7.4 11.6 5 7.8 petioles Range (0-16) (8-13) (9-14) (10-12) (0-13) (0-10) (10-13) (0-12) (0-12) (>35.6 cm) Number of inner Average 5.4 4.8 5.2 5.3 3.1 4.2 5.1 2.5 4 petioles Range (0-8) (4-6) (3-6) (4-6) (0-6) (0-5) (4-6) (0-6) (0-6) (<35.6 cm) Length of outer Average 33.3 28.1 32.3 28.6 24.5 28.6 28.4 28.0 25.4 petioles to the Range (30-37) (26.7-29) (28-36) (27-31) (22-27.3) (27-30) (26.3-33) (23-33) (22.3-27.7) joint (cm) Width of outer Average 20.9 26.1 24.9 25.4 14.6 22.9 22.4 13.2 19.3 petioles at the Range (0-27) (25-28.3) (22.3-28.3) (24-28.7) (0-26) (0-27) (21-23.7) (0-27.7) (0-28.3) midrib (mm) Thickness of Average 9.9 12.7 12.2 12.7 6.9 10.6 10.5 6.3 8.7 outer petioles Range (0-13.3) (11.3-13.7) (11.3-12.7) (11.7-14) (0-12.7) (0-13) (7-12.3) (0-13.3) (0-11.3) at the midrib (mm) Length of seed Average 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 stems (cm) Range (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) Median 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Petiole color 5gy 6/6 5gy 6/8, 5gy 6/6 5gy 6/6 5gy 6/6 5gy 6/6 5gy 6/4 5gy 6/6 5gy 7/4, (Munsell color) 5gy 3/4 5gy 6/4 Leaf color (Munsell color) 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 Petiole smoothness Smooth Smooth Slight rib Smooth/ Smooth Slight Smooth Smooth/ Smooth Slight rib rib/Rib Slight rib Petiole cup Cup Cup Cup Cup Cup Cup Cup Cup Cup % Marketable 80%  100%  100%  100%  60%  100%  100%  50% 80% Disease ratings: Overall fusarium Average 5 5 5 5 3.5 5 5 4 3.5 ratings (0 = dead, Range 5 5 5 5 3-5 5 5 3-5 3-4 5 = tolerant) Root fusarium Average 3.5 5 5 4 3 3.5 4 2.5 2.5 ratings (0 = dead, Range 2-5 4-5 4-5 4-5 1-4 2-4 4 1-4 2-3 5 = tolerant) Defects: % Node crack 0% 0% 0% 0% 0% 0% 0% 30% 100%  % Brown stem 0% 0% 0% 0% 0% 0% 0%  0%  0% % Butt crack 10%  0% 0% 0% 10%  0% 0% 30% 20% % Top pith 0% 0% 0% 0% 10%  10%  0% 50%  0% % Butt pith 0% 70%  0% 0% 80%  100%  20%  50% 50% % Suckers 0% 0% 20%  0% 0% 0% 0% 20% 100%  % Feather leaf 0% 0% 0% 0% 0% 0% 0% 40%  0% % Twist 10%  20%  0% 0% 0% 40%  0% 30% 100% 

TABLE 20B ADS-20 ADS-22 Challenger Sonora Conquistador Command Mission ADS-23 Plant height (cm) Average 67.60 84.6 74.2 67.1 64.3 71.80 70.7 51.40 Range (61-73) (81-89) (37-90) (62-72) (23-74) (63-77) (65-75) (32-70) Whole plant weight Average 1.00 1.35 1.07 1.03 0.80 1.20 0.98 0.43 (kg) Range (0.6-1.28) (0.98-1.52) (0.08-1.52) (0.46-1.44) (0.06-1.3) (0.92-1.42) (0.68-1.26) (0.1-0.86) Trimmed plant Average 0.67 1.08 0.50 0.45 0.60 1.04 0.26 NA weight (kg @ 35.6 (0-1.1) (0.8-1.18) (0-1.22) (0-1.22) (0-1.56) (0.8-1.28) (0-1.06) cm) Range Number of outer Average 6.5 10.9 4.8 4.9 5.1 10.0 2.8 NA petioles (>35.6 cm) Range (0-11) (9-13) (0-11) (0-14) (0-13) (9-11) (0-10) Number of inner Average 3.5 5.5 2.8 4.4 3.2 6.7 1.7 NA petioles (<35.6 cm) Range (0-6) (4-7) (0-7) (0-14) (0-8) (6-8) (0-7) Length of outer Average 26.2 24.4 29.0 25.1 23.9 25.7 27.8 16.4 petioles to the joint Range (21.3-30.3) (22.7-25.7) (16-34.7) (18.3-27) (8-29) (21.3-29.7) (26-30.7) (10.3-25.3) (cm) Width of outer Average 17.2 25.2 11.2 8.4 11.3 24.7 6.8 NA petioles at the midrib Range (0-26) (23-27.3) (0-26) (0-22.3) (0-23.7) (22-27.7) (0-21) (mm) Thickness of outer Average 8.1 12.0 5.6 3.9 5.3 11.8 2.8 NA petioles at the midrib Range (0-12.7) (10.7-13) (0-12.7) (0-10.3) (0-11.3) (10-14.7) (0-10) (mm) Length of seed stems Average 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.3 (cm) Range (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) (0-0) (0-23) Median 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Petiole color (Munsell color) 5gy 7/4, 5gy 6/6 5gy 6/6 5gy 6/6 5gy 6/6 5gy 6/6 5gy 6/6 NA 5gy 6/4 Leaf color (Munsell color) 5gy 3/4 5gy 3/4 5gy 3/4 5gy 4/4 5gy 4/4 5gy 4/4 5gy 4/4 NA Petiole smoothness Smooth Smooth Smooth/ Slight rib Smooth Slight rib Slight rib NA Slight rib Petiole cup Cup Cup Cup Cup Cup Cup Cup NA % Marketable 70% 100%  40% 40% 50% 100%  30%  0% Disease ratings: Overall fusarium Average 4 5 4.5 3.5 3.5 5 3.5 1 ratings (0 = dead, Range 3-4 5 1-5 2-5 1-5 5 2-5 1-2 5 = tolerant) Root fusarium ratings Average 2.5 4 3 2.5 2.5 2.5 1.5 1 (0 = dead, Range 1-3 3-4 1-4 1-4 1-4 1-4 1-4 1 5 = tolerant) Defects: % Node crack 100%  10%  0% 10%  0% 50%  0%  0% % Brown stem  0%  0% 40% 30%  0%  0% 40%  90% % Butt crack 30% 10% 50% 40% 30%  0% 30% 100% % Top pith 30%  0% 50% 60% 50% 40% 70% 100% % Butt pith 50% 50%  0% 90% 90% 50% 90% 100% % Suckers 80%  0% 10%  0% 30%  0%  0% 100% % Feather leaf  0%  0% 30% 60% 70% 20% 40%  70% % Twist 100%  40% 100%  60% 50% 20% 50% 100%

TABLE 20C Tall Utah 52-70 ‘R’ Tall Utah TBG 31 TBG 54 ADS-8 TBG 35 TBG 32 TBG 53 Strain 52-75 Plant height (cm) Average 69.40 64.00 52.80 49.70 69.90 75.80 54.8 65.8 Range (32-83) (59-70) (36-77) (28-92) (63-79) (72-79) (46-62) (57-72) Whole plant weight Average 1.28 0.93 0.34 0.45 1.03 1.34 0.68 0.82 (kg) Range (0.14-1.94) (0.7-1.26) (0.1-0.96) (0.12-1.08) (0.48-1.94) (1-1.68) (0.2-1.48) (0-1.24) Trimmed plant Average 0.50 0.28 NA NA 0.17 0.85 NA 0.44 weight (kg) Range (0-1.44) (0-1.06) (0-1) (0-1.32) (0-1.04) Number of outer Average 4.7 2.7 NA NA 2.5 10.2 NA 4.4 petioles Range (0-13) (0-10) (0-14) (0-15) (0-10) Number of inner Average 2.2 1.3 NA NA 0.9 4.1 NA 2.7 petioles Range (0-6) (0-5) (0-6) (0-7) (0-6) Length of outer Average 27.9 29.2 13.9 15.3 29.3 32.1 20.5 25.0 petioles to the joint Range (11.7-36) (22-66) (10.7-20) (9.3-22.3) (16.7-35.7) (28.7-36.7) (16-24) (19.3-29.3) (cm) Width of outer Average 10.0 7.1 NA NA 3.9 18.0 NA 11.2 petioles at the midrib Range (0-26.3) (0-25) (0-19.3) (0-24) (0-24) (mm) Thickness of outer Average 5.0 3.5 NA NA 2.1 9.0 NA 5.4 petioles at the midrib Range (0-13) (0-12.7) (0-11.3) (0-12.7) (0-12) (mm) Length of seed stems Average 18.4 0.0 29.3 12.7 20.2 0.0 6.4 0.0 (cm) Range (0-83) (0-0) (0-77) (0-92) (0-64) (0-0) (0-30) (0-0) Median 0.0 0.0 15.5 2.0 12.5 0.0 1.5 0.0 Petiole color (Munsell color) 5gy 7/4- 5gy 7/4-5gy 6/6 NA NA NA 5gy 7/4- NA 5gy 6/6 5gy 6/6 5gy 6/6 Leaf color (Munsell color) 5gy 3/4 5gy 3/4 NA NA NA 5gy 3/4 NA 5gy 4/4 Petiole smoothness Slight rib/Rib Smooth/ NA NA Smooth Slight NA Smooth Slight rib rib/Rib Petiole cup Cup Cup NA NA Slight cup Slight NA Cup cup/Cup % Marketable 20% 30%  0%  0% 10% 80%   0% 50% Disease ratings: Overall fusarium Average 4 3.5 1 1 3.5 4 1.5 3 ratings (0 = dead, Range 1-5 3-4 0-2 1-2 3-4 4-5 0-3 1-5 5 = tolerant) Root fusarium ratings Average 2.5 2 1 1 2 3 1.5 2 (0 = dead, Range 1-3 1-3 0-1 1-2 1-3 3 0-3 1-3 5 = tolerant) Defects: % Node crack  0%  0%  0%  0%  0% 0%  0%  0% % Brown stem 30%  0%  80%  40%  0% 0%  60%  0% % Butt crack 60% 30% 100% 100% 50% 0% 100% 40% % Top pith 60% 70% 100% 100% 90% 0% 100% 70% % Butt pith 70% 100%  100% 100% 90% 100%  100% 90% % Suckers 30%  0% 100% 100% 60% 0% 100%  0% % Feather leaf 50% 70%  0%  0% 40% 30%  100% 50% % Twist 60%  0% 100% 100% 60% 0% 100% 50%

As shown in Tables 20A, 20B, and 20C, celery cultivar TBG 43 and TBG 45 were the most tolerant to Fusarium oxysporum race 2 based on both the overall and root infection ratings, in addition to the percent marketability followed closely by TBG 29 and TBG 37, and slightly more distantly TBG 28. Of these, TBG 28 was the tallest for plant height followed by TBG 45, and the others were fairly similar. TBG 45 and TBG 28 were very similar with longer petiole length compared to TBG 43, TBG 29, and TBG 37. Except for Tall Utah 52-70 ‘R’ Strain, bolting pressure was not notable in what most would consider the California coastal varieties. However, it was a significant issue in varieties developed for Florida production including ADS-8, TBG 31, TBG 32, and ADS-23. It was not observed in two Florida varieties TBG 54 and TBG 53.

Table 21 shows the results of a trial comparing characteristics of celery cultivar TBG 28 to celery varieties TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 31, TBG 54, TBG 35, TBG 32, and TBG 53. The trial was transplanted in Oxnard, California on Mar. 8, 2021, and evaluated on Jun. 25, 2021 (109 days) in a normal production field with very low pressure due to Fusarium oxysporum race 2, but slight pressure for bolting (442 hours below 50° F.). The plant population (58,080 plants to the acre) was higher than the commercial norm of approximately 45,000 to 47,000 plants to the acre. Table 21, column 1 shows the characteristic and columns 2-13 show the results for TBG 28, TBG 43, TBG 45, TBG 29, ADS-1, TBG 34, TBG 37, TBG 31, TBG 54, TBG 35, TBG 32, and TBG 53, respectively. NA indicates data not available.

TABLE 21 TBG 28 TBG 43 TBG 45 TBG 29 ADS-1 TBG 34 Plant height Average 97.5 88.9 83.4 80.5 80.2 80.4 (cm) Range (94-104) (86-92) (82-88) (78-83) (75-85) (77-84) Whole plant Average 1.72 1.77 1.76 1.87 1.69 1.27 weight (kg) Range (1.32-2.12) (1.48-2.02) (1.46-2.1) (1.6-2.28) (1.46-2.12) (0.98-1.62) Trimmed plant Average 1.25 1.27 1.29 1.42 1.31 0.94 weight Range (0.94-1.5) (1.1-1.46) (1.06- (1.22-1.74) (1.1-1.6) (0.76-1.18) (kg @ 35.6 cm) 1.52) Number of Average 12.9 11.2 12.1 12.0 10.5 9.6 (>35.6 cm) Range (11-16) (10-12) (10-14) (10-14) (9-12) (8-11) outer petioles Number of Average 5.6 5.2 4.5 4.9 6.1 3.3 inner petioles Range (4-7) (4-6) (3-5) (4-8) (5-7) (3-4) (<35.6 cm) Length of outer Average 38.9 30.2 31.3 26.9 29.4 31.0 petioles to the Range (36.3-40.7) (28-31.7) (28-36.3) (18-30.3) (26.3-31.7) (28.7-33.7) joint (cm) Width of outer Average 28.1 28.3 27.3 30.3 26.8 27.1 petioles at the Range (26.7-29.7) (25.3-30.3) (24.3-29) (28.7-33.7) (22.3-29.3 (26-28.7) midrib (mm) Thickness of Average 11.9 12.5 11.0 12.6 12.0 11.0 outer petioles at Range (11-13) (12-13.3) (10-12) (11.3-14) (10.3-13) (9.7-12.3) the midrib (mm) Seed stem Average 0.0 0.0 0.0 0.0 1.3 0.0 length (cm) Range (0-0) (0-0) (0-0) (0-0) (0-11) (0-0) Median 0.0 0.0 0.0 0.0 0.0 0.0 Petiole color 5gy 6/6 5gy 6/6 5gy 6/6 5gy 7/6 5gy 6/6 5gy 6/6 (Munsell color) Leaf color 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 5gy 3/4 (Munsell color) Petiole smoothness Smooth Smooth Slight Smooth/ Smooth Smooth Petiole cup rib/Rib Slight rib Cup Cup Slight Slight cup Cup/ Cup cup/Cup Deep cup % Marketable 100%  100%  100%  100%  100%  100%  Defects: % Top pith 0% 0% 0% 0% 0% 100%  % Butt pith 0% 0% 0% 0% 0% 0% % Node crack 0% 0% 0% 20%  0% 30%  % Butt crack 0% 0% 0% 0% 0% 0% % Suckers 0% 0% 20%  0% 0% 10%  % Feather leaf 0% 0% 20%  30%  0% 0% % Twist 100%  10%  0% 0% 0% 20%  % Black heart 0% 0% 0% 0% 0% 0% % Brown stem 0% 0% 0% 0% 0% 0% TBG 37 TBG 31 TBG 54 TBG 35 TBG 32 TBG 53 Plant height Average 89.0 43.6 48.8 NA 35.4 91.8 (cm) Range (83-95) (0-89) (0-85) (0-91) (89-95) Whole plant Average 1.53 0.85 0.77 NA 0.59 1.20 weight (kg) Range (1.18-1.86) (0-2) (0-1.55) (0-1.72) (0-1.7) Trimmed plant Average 1.14 0.48 0.57 NA 0.43 0.81 weight Range (0.82-1.44) (0-1.38) (0-1.18) (0-1.24) (0-1.16) (kg @ 35.6 cm) Number of Average 11.7 4.9 6.8 NA 4.4 9.5 (>35.6 cm) Range (9-13) (0-14) (0-13) (0-14) (0-13) outer petioles Number of Average 5.2 1.7 2.2 NA 4.4 3.3 inner petioles Range (4-6) (0-6) (0-5) (0-14) (0-5) (<35.6 cm) Length of outer Average 34.4 13.7 17.9 NA 14.0 27.5 petioles to the Range (30.7-38.7) (0-37.3) (0-33.3) (0-37) (0-38) joint (cm) Width of outer Average 25.3 10.1 14.2 NA 10.6 19.7 petioles at the Range (22.3-27) (0-26.7) (0-25.7) (0-29.7) (0-25.7) midrib (mm) Thickness of Average 10.3 4.7 6.5 NA 4.7 8.6 outer petioles at Range (9.3-11.7) (0-13.3) (0-12.7) (0-12.3) (0-12) the midrib (mm) Seed stem Average 0.5 43.7 23.2 118.7 68.3 13.1 length (cm) Range (0-4) (0-96) (0-71) (99-140) (0-131) (0-80) Median 0.0 53.5 16.0 118.0 84.0 0.8 Petiole color 5gy 6/6 5gy 7/6 5gy 7/6 NA 5gy 7/6 5gy 6/6 (Munsell color) Leaf color 5gy 3/4 5gy 4/4 5gy 4/4 NA 5gy 4/4 5gy 4/4 (Munsell color) Petiole smoothness Smooth Smooth Smooth NA Smooth Smooth Petiole cup Cup Cup Cup NA Slight Slight cup cup % Marketable 100%   0% 0% 0% 30% 80% Defects: % Top pith 0% 100%  100%  NA 100%  20% % Butt pith 0% 100%  40%  NA 80% 20% % Node crack 0%  0% 0% NA  0% 10% % Butt crack 0% 10% 0% NA  0%  0% % Suckers 0% 40% 40%  NA 60% 20% % Feather leaf 0%  0% 0% NA  0%  0% % Twist 40%  40% 0% NA 60% 20% % Black heart 0% 10% 0% NA  0%  0% % Brown stem 10%  30% 80%  NA 70% 20%

As shown in Table 21, under the slight bolting pressure that this trial experienced, varieties specially developed for production in Florida had significant seed stem development (TBG 35, TBG 31, TBG 32, TBG 54). Except for ADS-1, there was very little impact on the remaining varieties which had been developed for production in California. Under these conditions, TBG 29 out yielded all varieties (trimmed plant weight), and TBG 45, TBG 43, ADS-1, and TBG 28 were very similar and next in line for trimmed weight. However, TBG 29 and TBG 45 were impacted more by feather leaves. TBG 28 performed as it would normally, producing the tallest plants with the longest petioles to the joint followed by TBG 37; however, both also had more petiole twisting. TBG 45, TBG 29, and TBG 28 were similar in producing an average of 12 or more petioles longer than 35.6 cm. ADS-1 and TBG 43 appeared to be most similar with one another for most of their characteristics and the two that were most free from defects. NA indicates that the data for that particular item was not available, in this case for TBG 35 due to severe seed stem development and distortion.

Table 22 shows the results from trials that were planted in Oxnard, California in 2018, 2019, 2020, and 2021 specifically for evaluating, identifying, and developing varieties with improved tolerance to Septoria apiicola (celery late blight). These trials were inoculated with spore suspension of septoria in order to induce infection. Infection ratings were scored with 1 representing susceptible and 5 representing tolerant. The range represents variations between replications and the average is their mean. NA=not available=not in the trial. Table 22, column 1 shows the variety, columns 2-9 show the range and average ratings in 2018, 2019, 2020, and 2021, respectively, and column 10 shows the overall average rating.

TABLE 22 2018 2019 2020 2021 RATING RATING RATING RATING Overall VARIETY Range Average Range Average Range Average Range Average Average TBG 37 2 2 3-4 3.5 1-2 1.3 2-3 2.5 2.3 TBG 28 1-3 1.5 2-4 2.5 NA NA 3 3 2.3 ADS-20 1-3 2.5 2 2 1 1 2 2 1.9 TBG 43 2 2 1-2 1.6 1 1 1 1 1.4 TBG 45 NA NA NA NA NA NA 2 2 2.0 TBG 29 1 1 1-2 1.5 1-2 1 1 1 1.1 ADS-1 1-2 1 2-3 2.5 1-3 1.5 3 3 2.0 ADS-22 2 2 NA NA NA NA NA NA 2.0 TBG 33 1-2 1.5 2-4 3.5 1 1 1-3 2 2.0 ADS-23 4 4 4 4 1 1 1-2 1.5 2.6 TBG 31 1 1 NA NA 1 1 1-3 2 1.3 TBG 54 1-2 1 NA NA NA NA NA NA 1.0 TBG 32 2 2 3 3 1 1 1-3 2 2.0 TBG 53 NA NA 3 3 1 1 NA NA 2.0 TBG 35 1 1 NA NA NA NA NA NA 1.0 Floribelle 2 2 NA NA 1 1 3 3 2.0

As shown in Table 22, under these conditions there is some variation between years and in particular 2020 which had heavier infection (based on ratings). Much of this can be attributed to variable infectious conditions between years, timing of rating the infection (later ratings generally result in heavier infection rates) and on occasion for plot variation within a year the presence of more infected plots surrounding particular plots which provided more secondary inoculum. On a rating scale of 1 to 5, with 5 being tolerant TBG 37 and TBG 28 were generally slightly below moderately tolerant, and ADS-23 was moderately tolerant (considering overall average for four years.

Table 23 shows results from trials that were planted in Byron Center, Michigan in 2013, 2018, and 2021, specifically for evaluating, identifying, and developing varieties with improved tolerance to Colletotrichum fioriniae. These trials were planted in a field that has a strong history for natural Colletotrichum infection. Infection data presented in this table represents the percentage of plants infected with Colletotrichum. The average is the average between two years (2013 & 2018 only) because in 2021 the only varieties included in the trial from prior years were ADS-1 and TBG 28. The data for 2020 was presented in the table to the right of the average. Table 23, column 1 shows the variety and columns 2-5 show the results from 2013, 2018, average of 2013 and 2018, and 2021, respectively. NA indicates data not available.

TABLE 23 Average Variety 2013 2018 (2013 & 2018) 2021 TBG 28 14.3% 9.1% 11.7% 14% TBG 33 NA 10.7% 10.7% NA TBG 32 5.4% 16.7% 11.1% NA TBG 31 NA 21.5% 21.5% NA TBG 35 25.6% 23.1% 24.4% NA TBG 54 NA 30.2% 30.2% NA ADS-22 34.1% 33.3% 33.7% NA ADS-8 9.0% 61.8% 35.4% NA ADS-1 55.9% 42.4% 49.2% 25% TBG 43 NA 50.9% 50.9% NA TBG 37 NA 52.9% 52.9% NA ADS-23 NA 56.9% 56.9% NA TBG 29 28.1% 59.7% 43.9% NA

As shown in Table 23, under these conditions TBG 28, TBG 33, and TBG 32 demonstrated improved Colletotrichum tolerance (% infection each year and average for two years) compared to the other varieties including two varieties that are commercial standards in Michigan (ADS-1 and ADS-22).

Table 24 shows the results from trials that were planted in Belle Glade, Florida for evaluation in 2016, 2019, 2020, and 2021 specifically for evaluating, identifying, and developing varieties with improved tolerance to Cercospora apii (celery early blight). These trials were transplanted in the late fall in order to be present in the most environmental favorable window for natural infection by cercospora. Infection ratings presented here represent an average score from 1 to 5 where 1 represents most susceptible and 5 represents most tolerant. Table 24, column 1 shows the variety and columns 2-6 show the results for 2016, 2019, 2020, 2021, and overall average, respectively. NA=not available=not in the trial.

TABLE 24 Year Overall VARIETY 2016 2019 2020 2021 Average Floribelle 5 4.5 5 3.9 4.6 TBG 32 5 3.4 4 2.8 3.8 ADS-2 NA NA 5 1.7 3.4 ADS-23 5 2.5 4 1.5 3.3 TBG 53 NA NA 3 2.8 2.9 TBG 31 2 2.5 5 1.8 2.8 TBG 28 NA 2.5 2.5 3.2 2.7 TBG 37 NA 2 4 1.4 2.5 TBG 54 1 2 5 1.7 2.4 ADS-1 NA 2 3 1.9 2.3 TBG 29 4 1.5 2 1.2 2.2 ADS-20 NA 2 NA NA 2.0 TBG 33 NA 2.5 2 1 1.8 ADS-22 NA 1.5 NA NA 1.5 TBG 34 NA 1.5 NA NA 1.5 TBG 43 NA 1.5 NA NA 1.5 TBG 35 1 1.3 1 1 1.1 ADS-8 1 NA 1 1 1.0 GREENBAY NA 1.5 NA NA 1.5 SABROSO NA 1.5 NA NA 1.5

As shown in Table 24, under these conditions there is some variation between years and in particular 2020 which had several varieties that appeared to perform better than other years. Much of this can be attributed to variable infectious conditions between years, timing of rating the infection and on occasion for plot variation within a year the presence of more infected plots surrounding particular plots which provided more secondary inoculum. On a rating scale of 1 to 5 with 5 being tolerant, Floribelle was consistently the most tolerant variety followed by TBG 32. TBG 53 appears to be more similar to TBG 32, and TBG 28 appears to have moderate tolerance more comparable to TBG 31, however more consistent across the years than TBG 31. ADS-2 and ADS 23 also appear to be more tolerant (moderate), however the results were not as consistent between years. Most other varieties were fairly susceptible to susceptible.

The use of the terms “a,” “an,” and “the,” and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms “comprising,” “having,” “including,” and “containing” are to be construed as open-ended terms (i.e., meaning “including, but not limited to,”) unless otherwise noted. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. For example, if the range 10-15 is disclosed, then 11, 12, 13, and 14 are also disclosed. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.

Deposit Information

A deposit of the celery cultivar seed of this invention is maintained by A. Duda & Sons, Inc., 1200 Duda Trail, Oviedo, Florida 32765, U.S.A. Access to this deposit will be available during the pendency of this application to persons determined by the Commissioner of Patents and Trademarks to be entitled thereto under 37 CFR § 1.14 and 35 USC § 122. Upon allowance of any claims in this application, all restrictions on the availability to the public of the variety will be irrevocably removed by affording access to a deposit of at least 625 seeds of the same variety with the American Type Culture Collection (ATCC), 10801 University Boulevard, Manassas, Va. 20110 or National Collections of Industrial, Food and Marine Bacteria (NCIMB), 23 St Machar Drive, Aberdeen, Scotland, AB24 3RY, United Kingdom.

While a number of exemplary aspects and embodiments have been discussed above, those of skill in the art will recognize certain modifications, permutations, additions, and sub-combinations thereof. It is therefore intended that the following appended claims and claims hereafter introduced are interpreted to include all such modifications, permutations, additions, and sub-combinations as are within their true spirit and scope. 

1. A seed, plant, or a plant part thereof, of celery cultivar designated TBG 28, wherein a representative sample of seed of said cultivar has been deposited under ATCC Accession No. PTA-______.
 2. A celery plant, or a plant part thereof, having essentially all of the physiological and morphological characteristics of the celery plant of claim
 1. 3. A tissue or cell culture produced from protoplasts or cells from the plant of claim 1, wherein said cells or protoplasts are produced from a plant part selected from the group consisting of leaf, callus, pollen, ovule, embryo, cotyledon, hypocotyl, meristematic cell, root, root tip, pistil, anther, flower, seed, shoot, stem, stalk, petiole, and sucker.
 4. A celery plant regenerated from the tissue culture of claim 3, wherein said regenerated plant comprises all of the morphological and physiological characteristics of celery cultivar TBG
 28. 5. A method of producing a celery seed, wherein the method comprises crossing the plant of claim 1 with a different celery plant and harvesting the resultant celery seed.
 6. A celery seed produced by the method of claim
 5. 7. A celery plant, or a plant part thereof, produced by growing said seed of claim
 6. 8. A method of producing an herbicide resistant celery plant, wherein said method comprises introducing a gene conferring herbicide resistance into the plant of claim
 1. 9. A herbicide resistant celery plant produced by the method of claim 8, wherein the gene confers resistance to a herbicide selected from the group consisting of glyphosate, sulfonylurea, imidazolinone, dicamba, glufosinate, phenoxy proprionic acid, L-phosphinothricin, cyclohexone, cyclohexanedione, triazine, benzonitrile protoporphyrinogen oxidase (PPO)-inhibitor herbicides, auxin herbicides, and broxynil.
 10. A method of producing a pest or insect resistant celery plant, wherein said method comprises introducing a gene conferring pest or insect resistance into the celery plant of claim
 1. 11. A pest or insect resistant celery plant produced by the method of claim
 10. 12. The celery plant of claim 11, wherein the gene encodes a Bacillus thuringiensis (Bt) endotoxin.
 13. A method of producing a disease resistant celery plant, wherein said method comprises introducing a gene into the celery plant of claim
 1. 14. A disease resistant celery plant produced by the method of claim
 13. 15. A method of producing a celery plant with modified fatty acid metabolism or modified carbohydrate metabolism comprising transforming the celery plant of claim 1 with a transgene encoding a protein selected from the group consisting of fructosyltransferase, levansucrase, α-amylase, invertase and starch branching enzyme or DNA encoding an antisense of stearyl-ACP desaturase.
 16. A celery plant having modified fatty acid metabolism or modified carbohydrate metabolism produced by the method of claim
 15. 17. A method for producing a male sterile celery plant, wherein said method comprises transforming the celery plant of claim 1 with a nucleic acid molecule that confers male sterility.
 18. A male sterile celery plant produced by the method of claim
 17. 19. A method of introducing a desired trait into celery cultivar TBG 28, wherein the method comprises: (a) crossing a TBG 28 plant, wherein a representative sample of seed was deposited under ATCC Accession No. PTA-______, with a plant of another celery cultivar that comprises a desired trait to produce progeny plants, wherein the desired trait is selected from the group consisting of improved nutritional quality, industrial usage, male sterility, herbicide resistance, insect resistance, modified seed yield, modified lodging resistance, modified iron-deficiency chlorosis and resistance to bacterial disease, fungal disease or viral disease; (b) selecting one or more progeny plants that have the desired trait to produce selected progeny plants; (c) backcrossing the selected progeny plants with the TBG 28 plants to produce backcross progeny plants; (d) selecting for backcross progeny plants that have the desired trait; and (e) repeating steps (c) and (d) two or more times in succession to produce selected third or higher backcross progeny plants that comprise the desired trait.
 20. A celery plant produced by the method of claim 19, wherein the plant has the desired trait and otherwise all of the physiological and morphological characteristics of celery cultivar TBG
 28. 21. The celery plant of claim 20, wherein the desired trait is herbicide resistance and the resistance is conferred to a herbicide selected from the group consisting of imidazolinone, dicamba, cyclohexanedione, sulfonylurea, glyphosate, glufosinate, phenoxy proprionic acid, L-phosphinothricin, triazine, benzonitrile protoporphyrinogen oxidase (PPO)-inhibitor herbicides, auxin herbicides, and broxynil.
 22. The celery plant of claim 20, wherein the desired trait is insect resistance and the insect resistance is conferred by a gene encoding a Bacillus thuringiensis endotoxin.
 23. The celery plant of claim 20, wherein the desired trait is male sterility and the trait is conferred by a cytoplasmic nucleic acid molecule.
 24. A method of producing a genetically modified celery plant, wherein the method comprises mutation, transformation, gene conversion, genome editing, RNA interference or gene silencing of the plant of claim
 1. 25. A genetically modified celery plant produced by the method of claim 24, wherein the plant comprises the genetic modification and otherwise comprises all of the physiological and morphological characteristics of celery cultivar TBG
 28. 